Which of the Following Is the Important Lesson to Be

Which of the following is the important lesson to be learned from Zimbardo's Stanford Prison Experiment in which university students played the roles of guards and prisoners.

A) Personality variables often have a much stronger impact on behaviour than situational variables.
B) People who are by nature authoritarian and abusive prefer jobs like being a prison guard.
C) The feeling of being crowded that results from the presence of other people can lead to prison violence.
D) The behaviours associated with certain roles can overwhelm one's personal identity and sense of decency.
E) People who have strong moral convictions are less likely to become abusive than weak, passive people.