Vygotsky Was a Contemporary of Piaget's Whose Research in the Area

Multiple Choice

Vygotsky was a contemporary of Piaget's whose research in the area of cognitive development in children indicates that

A) the narrower the zone of proximal development, the easier it is to capitalize on instruction and grasp difficult concepts.
B) we learn best when instruction is pitched just above the lower limit of our zone of proximal development.
C) problem-solving skills and strategies tend to transcend cultural differences.
D) social interactions and experiences play no role in cognitive development.