A Child Seen Playing at the Beach Has First Poured

Multiple Choice

A child seen playing at the beach has first poured a bucket of sand into a short,fat container and then another bucket into a tall,thin container.When asked which container holds more sand,the child points to the tall,thin container.This response suggests that she is at Piaget's _____ stage of cognitive development.

A) formal operational
B) preoperational
C) motor
D) concrete operational