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

The correct answers are: adolescence  /  lack of cognitive development

Explanation:

This is also called the conventional level in which people start to incorporate the moral standards of valued adult role models. Authority is not questioned and based on the norms of a group we reason and act. Teenagers like to be seen by others and to be approved and the wider rules of society start to become part of our awareness.

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