Which One of the Following Was Ethically Controversial in the Case

Multiple Choice

Which one of the following was ethically controversial in the case of the Milgram experiment?

A) The people were recruited as a part of the study without their knowledge.
B) The people in the study were deceived into thinking they were hurting someone.
C) The people in the study were paid an excessive amount of money to participate, skewing the results.
D) The people in the study were not allowed to leave the study even after multiple requests to end their participation.