In Comparing Vygotsky's and Piaget's Views of Cognitive Development, Which

In comparing Vygotsky's and Piaget's views of cognitive development, which statement would be most accurate?

A) Vygotsky believed the course of intellectual growth was more universal than Piaget assumed, but the content of intellectual growth was more variable than Piaget assumed.
B) Vygotsky believed both the course and the content of intellectual growth were more universal than Piaget assumed.
C) Vygotsky believed neither the course nor the content of intellectual growth was as universal as Piaget assumed.
D) Vygotsky believed the course of intellectual growth was more variable than Piaget assumed, but the content of intellectual growth was more universal than Piaget assumed.