In the Stanford Prison Study, Normal Healthy Male College Students

In the Stanford Prison study, normal healthy male college students were paid to serve as "prisoners" and "guards" in a simulated prison. During this research,

A) three "prisoners" were so severely beaten they had to be hospitalized.
B) the "guards" did not take their roles seriously.
C) the "prisoners" quickly became passive and dehumanized.
D) the "prisoners" and the "guards" quickly became too friendly towards one another.