Anabela A man and woman scowl and look over their shoulders at each other. Juan y Luisa A well organized bedroom. There are neatly organized books on a dresser and a photo on the wall. la habitación de Teresa A bedroom with messy sheets and clothes lying around. A pizza box is under the bed and a cup is on the floor. A drawer is open with a sock hanging out of it. Books are messily lined up on a dresser. la habitación de César:

What was piaget's explanation as to why preschool-age children in the preoperational stage make errors on tasks requiring conservation? a) preschool children's tendency toward centration prevents them from focusing on other relevant features of a situation b) preschool children have not yet developed numerical understanding; therefore, different amounts are meaningless c) preschool children's neural-visual network is not fully matured d) preschool children have not lived long enough and accrued enough experience to know the difference between quantities