An open biopsy, non-healing wound, ulcer or significant traumatic injury within days prior to starting treatment (percutaneous, endobronchial, and endoscopic biopsies are allowed) No major surgical procedure or significant traumatic injury within weeks prior to study registration, and must have fully recovered from any such procedure. Major surgery, open biopsy or significant traumatic injury within weeks prior to study entry Major surgical procedure or significant traumatic injury within days prior to study enrollment Major surgical procedure or significant traumatic injury within days before start of study registration Major surgical procedure, open biopsy, or significant traumatic injury within days before start of study medication Major surgical procedure, open biopsy, or significant traumatic injury within days before start of study medication Major surgical procedure, open biopsy, or significant traumatic injury within days before start of study medication Patients who have had a major surgical procedure within days of randomization. Patient has significant traumatic injury within days before randomization. Had major surgical procedure, open biopsy, or significant traumatic injury within days prior to day of treatment on study A major surgical procedure, open biopsy, or significant traumatic injury within months prior to cycle day (percutaneous/endobronchial/endoscopic biopsies are allowed) Serious non-healing wound, ulcer, bone fracture, major surgical procedure, open biopsy or significant traumatic injury within days prior to on-study status Major surgical procedure or significant traumatic injury within days prior to study drug administration. FOR ALL PHASES (Ib AND II): Major surgical procedure or significant traumatic injury (as judged by the investigator) within days before start of study medication, open biopsy within days before start of study medication Major surgical procedure or significant traumatic injury within days before start of study medication Major surgical procedure, open biopsy, or significant traumatic injury within days of day of therapy. Major surgical procedure or significant traumatic injury within days before start of study medication Major surgery, open biopsy or significant traumatic injury within days before the start of study treatment A major surgical procedure, open biopsy, or significant traumatic injury within days prior to starting cediranib (percutaneous/endobronchial biopsies are allowed) Major surgical procedure, open biopsy or significant traumatic injury =< days prior to registration Major surgical procedure, open biopsy, or significant traumatic injury within days of day of therapy Major surgery, open biopsy or significant traumatic injury within weeks of first study drug Major surgical procedure, open biopsy, or significant traumatic injury within days prior to starting cediranib Major surgery, open biopsy or significant traumatic injury within weeks of first study drug Major surgical procedure or significant traumatic injury within days prior to study drug administration Had major surgical procedure, open biopsy, or significant traumatic injury within days prior to day of treatment on study Serious non-healing wound, ulcer, bone fracture, major surgical procedure, open biopsy or significant traumatic injury within days prior to being registered for protocol therapy Major surgical procedure, open biopsy, or significant traumatic injury within days prior to starting cediranib Major surgical procedure, open biopsy, or significant traumatic injury within days prior to registration (biliary stenting or percutaneous biliary drainage are not included) Major surgical procedure, open biopsy, or significant traumatic injury less than weeks or those who receive minor surgical procedures (eg core biopsy or fine needle aspiration) within week from first dose of first study drug administration Major surgical procedure, open biopsy or significant traumatic injury within days prior to randomization on this study Craniotomy or any other major surgery, open biopsy, or significant traumatic injury within weeks of enrollment Patients are excluded if they have had a surgical procedure or a significant traumatic injury within days prior to randomization Major surgery (including ostomy reversal), open biopsy or significant trauma injury, within days prior to randomization. Major surgical procedure, open biopsy, or significant traumatic injury within days before start of study medication Major surgery, open biopsy or significant traumatic injury within weeks of first study drug Have had a major surgical procedure or significant traumatic injury including nonhealing wound, peptic ulcer, or bone fracture ? days prior to randomization. Major surgical procedure, open biopsy, or significant traumatic injury within days before start of study medication. Had major surgical procedure, open biopsy, or significant traumatic injury within days prior to day of treatment on study Major surgical procedure or significant traumatic injury within weeks prior to first dose of study treatment Subject has undergone a major surgical procedure, open biopsy, radiofrequency ablation or has experienced a significant injury within days prior to enrollment Major surgical procedure, open biopsy, or significant traumatic injury within days prior to starting nivolumab and bevacizumab Major surgical procedure, open biopsy, or significant traumatic injury =< days prior to randomization Major surgical procedure, open biopsy, or significant traumatic injury within days before start of study medication Major surgical procedure, open biopsy, or significant traumatic injury =< days prior to randomization Participants may not have a major surgical procedure, open biopsy, or significant traumatic injury within days prior to starting cediranib Major surgical procedure, open biopsy, or significant traumatic injury within days before start of study medication Major surgery, open biopsy or significant traumatic injury within weeks of first dose of study drug Major surgical procedure, open biopsy, or significant traumatic injury within days before start of study medication Major surgical procedure, laparoscopic procedure, open biopsy or significant traumatic injury within days prior to enrollment Major surgery, open biopsy or significant traumatic injury within weeks of first dose of study drug Major surgery, open biopsy or significant traumatic injury within weeks of first dose of study drug Major surgical procedure, open biopsy, or significant traumatic injury within days prior to registration (with the exception of craniotomy) Serious non-healing wound, ulcer, bone fracture, or have undergone a major surgical procedure, open biopsy, or significant traumatic injury =< days or core biopsy =< days prior to randomization Serious non-healing wound, ulcer, bone fracture, major surgical procedure, open biopsy or significant traumatic injury within days prior to being registered for protocol therapy Major surgical procedure, open biopsy, or significant traumatic injury within days before start of day of treatment with FOLFIRI Major surgical procedure, open biopsy, or significant traumatic injury within days prior to enrollment. Major surgical procedure, open biopsy, or significant traumatic injury within days prior to starting cediranib Major surgical procedure, open biopsy, or significant traumatic injury within days prior to day therapy No major surgery, open biopsy or significant traumatic injury within weeks of start of first dose Major surgical procedure or significant traumatic injury, radiotherapy, chemotherapy, targeted therapy, hormone therapy, or other anticancer therapy. Major surgical procedure or significant traumatic injury, as defined by the site investigator, within days before study registration. Major surgery, open biopsy or significant traumatic injury within weeks of starting therapy Major surgical procedure or significant traumatic injury within days before start of study medication Major surgical procedure, open biopsy, or significant traumatic injury within weeks before start of study medication Major surgical procedure, open biopsy, or significant traumatic injury within weeks before start of study medication Major surgical procedure, open biopsy, or significant traumatic injury within days prior to day of therapy Major surgical procedure, open biopsy, or significant traumatic injury less than weeks or those who receive minor surgical procedures (e.g. core biopsy or fine needle aspiration) within week from first dose of first study drug administration Major surgical procedure, open biopsy, or significant traumatic injury within days prior to Day of Cycle or abdominal surgery, abdominal interventions or significant abdominal traumatic injury within days prior to Day of Cycle Major surgical procedure, open biopsy, or significant traumatic injury within days before start of study medication Major surgical procedure, open biopsy, or significant traumatic injury within days before start of study medication Major surgical procedure, open biopsy, or significant traumatic injury within days before registration Craniotomy or any other major surgery, open biopsy, or significant traumatic injury within weeks of enrollment Major surgical procedure, open biopsy, or significant traumatic injury within days prior to initiation of treatment (or anticipated need during study) Major surgery, open biopsy or significant traumatic injury within weeks of first study drug Any serious non-healing wound, ulcer, bone fracture, major surgical procedure, open biopsy or significant traumatic injury within days prior to starting treatment with bevacizumab; if surgically cleared for chemotherapy on trial, bevacizumab may be delayed as clinically indicated up to weeks after such procedures Major surgery, open biopsy or significant traumatic injury within weeks of first study drug Major surgical procedure, open biopsy, or significant traumatic injury within days before start of study medication; minor procedures such as diagnostic laparoscopy, percutaneous biopsy and paracentesis within days before start of study medication Significant traumatic injury or major surgical procedure within weeks prior to starting study treatment Major surgical procedure or significant traumatic injury within days before start of study medication Major surgical procedure, open biopsy, or significant traumatic injury within days before start of study medication Major surgical procedure, open biopsy, or significant traumatic injury within days prior to Day of Cycle Major surgical procedure, traumatic injury, non-healing wound, or peptic ulcer ? days prior to randomization. Craniotomy or any other major surgery, open biopsy, or significant traumatic injury within weeks of randomization Major surgical procedure or significant traumatic injury within weeks prior to study registration or not fully recovered from any such procedure