Which of the following is the best statement of conclusion concerning Milgram's classic study involving the learner, teacher and ostensible shock?

A) Under certain circumstances, people seem to enjoy the opportunity to be cruel to others.
B) People have a strong tendency to obey an authority even if their actions may harm others.
C) The more people there are who observe someone in need of help, the less likely any one is to help.
D) Aggression seems to be a more potent force in human nature than had previously been suspected.

Milgram's study demonstrated that people have a strong tendency to obey an authority figure even if it means harming another person. This obedience can override the individual's own sense of morality and empathy for the victim. This conclusion is supported by the high percentage of participants who continued to administer shocks despite hearing the learner's cries of pain and protest. The study did not necessarily indicate that people enjoy being cruel or that aggression is a more potent force than previously suspected. While the bystander effect (option C) was not studied in Milgram's experiment, it is not a direct conclusion that can be drawn from the study's results.