In the Prison Study, Male College Students Agreed to Participate

In the prison study, male college students agreed to participate in a two-week experiment to discover what would happen when they took on the roles of prisoners and guards. The researchers found that:

A) within a short time the prisoners became distressed and panicky, developing emotional symptoms and physical ailments.
B) the subjects, prisoners and guards, were relieved when the experimenters decided that the study should be ended early.
C) the guards that tried to be "tough but fair" urged the tyrannical guards to lighten up on the prisoners because it was only an experiment.
D) about 10% of the guards became tyrannical, choosing harsh and abusive methods to maintain order.