Dr. Philip Zimbardo (1972) found that Stanford University students who had been randomly assigned to act as either a guard or prisoner in a simulated prison, adopted these roles completely. After 6 days the study had to be stopped as the guards became cruel and the prisoners suffered stress reactions. Dr. Zimbardo found that the behavior of the participants in the study began to shape their beliefs and attitudes. Dr. Zimbardo is most likely a:

A. Personality psychologist

B. Behavioral psychology

C. Social psychologist

D. Clinical psychologist