The Results of Zimbardo's Experiment on Deindividuation and Aggression, in Which

The results of Zimbardo's experiment on deindividuation and aggression, in which some subjects "shocked" a confederate while wearing hoods and loose-fitting robes, suggests that:

A) anonymity reduces concern over social evaluation, and therefore tends to increase aggression.
B) individuals are usually more aggressive when alone than in groups because there is no one around to make them feel guilty.
C) individuals are less aggressive when anonymous because they feel more responsible for their behaviors.
D) anonymity reduces self-esteem, and therefore increases the likelihood of aggressive behaviors.