When We Evaluate Piaget's Theory,we Can Conclude That

When we evaluate Piaget's theory,we can conclude that

A) infant cognitive development occurs in discrete stages and at the ages put forth by Piaget.
B) his theory does not hold true cross-culturally.
C) subsequent research shows children develop cognitive skills much later than Piaget proposed.
D) his theory has been supported cross-culturally in terms of the sequence and pattern of events.