If You Recall the Experiment Conducted by Stanley Milgram, It

If you recall the experiment conducted by Stanley Milgram, it is clear that cognitive dissonance theory played a large role in subjects' willingness to shock the helpless "learners." Which of the following statements might best predict higher levels of dissonance in the subjects?

A) Subjects appeared to feel calmer when the "learner" was in the room.
B) Subjects were relieved of any responsibility by the experimenter.
C) Subjects felt personally responsible for their actions.
D) Subjects were paid a large sum of money to participate.