Subjects in Milgram's Experiment Who Gave the Highest Level of Shocks

Subjects in Milgram's experiment who gave the highest level of shocks rationalized that they were NOT personally responsible for their actions. This raises questions about our willingness to commit inhumane acts as a result of

A) resistance compliance.
B) obedience to a legitimate authority.
C) self-assertion.
D) conformity to group pressure.