Twelve-Year-Old Nihls Was Having Difficulty Solving the Story Problems in His

Multiple Choice

Twelve-year-old Nihls was having difficulty solving the story problems in his math homework.However, when his dad helped Nihls by reading the problems to him and stressing the important information, Nihls was able to solve all the problems correctly.This parent-child interaction illustrates:

A) Piaget's concepts of assimilation and accommodation
B) Erikson's concept of industry versus inferiority
C) Piaget's concept of concrete operational thought
D) Vygotsky's concept of a zone of proximal development