The Best Way to Summarize Research That Has Examined Alternative

The best way to summarize research that has examined alternative explanations of children's performance on Piagetian tasks would be to say that

A) in almost every instance,Piaget's explanation is strongly supported.
B) in many instances,children's performance is better explained using concepts that are not part of
Piaget's theory.
C) Piaget's description of object permanence must be revised,but his accounts of conservation are strongly supported.
D) when Piaget's tasks are modified,they are usually not solved until children are older than the ages predicted by Piaget's theory.