Professor Gorsky Is Trying to Replicate Milgram's Obedience Experiments

Professor Gorsky is trying to replicate Milgram's obedience experiments. If Professor Gorsky allows the "teachers" to freely choose the level of shock given to the "learner," it is probable that:

A) about 65 percent would progress to the 450-volt level.
B) approximately 95 percent would not progress beyond the 150-volt level.
C) about 40 percent would progress to the 450-volt level.
D) none of the teachers would shock the learner at any level.