When Milgram and His Team Set Up Several Variations of His

When Milgram and his team set up several variations of his original study,they found that people were more likely to disobey when

A) the experimenter wore a white lab coat instead of street clothes.
B) a confederate acting as another teacher refused to comply.
C) a second experimenter agreed the experiment should continue.
D) they were only asked to read the word-pairs,but someone else had to deliver the shocks.