Piaget's Cognitive Theory of Development Is Based on Studies of

Piaget's cognitive theory of development is based on studies of

A) how children of different ages solve problems and make sense of the world.
B) how people's moral development moves from the abstract to concrete situations in which they are directly involved.
C) the different people, groups, and institutions that socialize us
D) the way people move from pure impulse to a balance in which impulse is channeled into socially acceptable forms.