Kohlberg Proposes That Moral Development Occurs in a Fixed Order

Kohlberg proposes that moral development occurs in a fixed order, and that people are unable to reach the highest stage of moral reasoning until __________ due to _____________

A) middle childhood; lack of cognitive development.
B) adolescence; lack of experience and peer pressure.
C) young adulthood; lack of experience.
D) adolescence; lack of cognitive development.