Which of the Following Was the Major Finding of Zimbardo's

Which of the following was the major finding of Zimbardo's simulated prison experiment?

A) Group cohesiveness is so important that individuals will restrain their natural impulses in order to remain part of the group.
B) Individuals can rapidly assimilate new roles very different from their inherent personalities.
C) Status differences between groups will always result in conflict between those groups.
D) An individual's emotions and the behavioral responses to those emotions are congruent.
E) When given the opportunity, people will tend to act in an oppressive manner to those around them.