According to Milgram, the most fundamental lesson to be learned from his study of obedience is that: a) people value their personal freedom and react negatively when they feel they are being forced to do something b) people are naturally predisposed to be hostile and aggressive c) the desire to be accepted by others is one of the strongest human motives d) even ordinary people, who are not usually hostile, can become agents of destruction.

The correct answer is letter D

Stanley Milgram (1933 - 1984) was an American psychologist graduated from Yale University who conducted the experience of the small worlds (the source of the concept of the six degrees of separation) and the Milgram Experience on obedience to authority.

This experiment aimed to study individual reactions to concrete indications from others. Obedience was measured through overt actions and implied behavior that was a source of suffering for others.