Answer:
According to Milgram, the most fundamental lesson to be learned from his study of obedience is that even ordinary people, who are not particularly hostile, can become agents of destruction (letter c).
Explanation:
Milgram conducted a study about obedience that is now quite controversial, since participants were deceived and possibly psychologically harmed. Milgram recruited a group of male adults to administer an electric shock to a person who was strapped to a chair in a different room every time that person made a mistake. The shocks weren't real, and the person in the chair was in on the study, but participants were not aware of those facts. They kept on electrocuting that person, obeying an actor who was in the same room with them, and who gave them orders such as, "You must continue". Most of the participants obeyed to the point where they would have killed the person in the chair if the shocks were real. These were ordinary people, not particularly hostile, but who nevertheless became agents of destruction due to their obedience. That is, according to Milgram, the most fundamental lesson to be learned from the study.
