According to Current Research on Piaget's Ideas on Formal-Operational Thought,which

Multiple Choice

According to current research on Piaget's ideas on formal-operational thought,which one of the following statements is not addressed?

A) There is less individual variation in formal-operational thought than Piaget believed.
B) Only one out of three young adolescents is a formal-operational thinker.
C) Many American adults never become formal-operational thinkers.
D) Many adults in other cultures never become formal-operational thinkers.