Jean Piaget and Other Proponents of Organismic Theory

Jean Piaget and other proponents of organismic theory:

A) were interested in the development of the mind,especially through various stages over the course of childhood and adolescence.
B) emphasized the importance of couples having children,so they can be secure in their later-life developmental stage.
C) learning theories,that focused on rewarding the child for doing something correctly,
D) were the first to state that parents should reward,not punish,children.