According to the Textbook,one of the Most Important Criticisms of Piaget's

According to the textbook,one of the most important criticisms of Piaget's theory of cognitive development is that _____.

A) his theory had very little impact on psychologists' understanding of how children's minds develop
B) the popularity of his theory was been very short-lived
C) his theory was never scientifically tested
D) recent research suggests his theory has underestimated the abilities of infants and overestimated the abilities of adults