Kohlberg's Study of Moral Development Was Criticized Because

Kohlberg's study of moral development was criticized because:

A) he set his own Puritan morals as the standard by which to judge.
B) he applied his analysis only to people in the U.S.A. and Western Europe.
C) of his argument that no human being has ever reached the postconventional level.
D) his research subjects were all males, but the results were generalized to both sexes.
E) not everyone exhibits moral behaviour.