William Is Playing a Game with His Little Brother,and He

Multiple Choice

William is playing a game with his little brother,and he takes his brother's favorite stuffed animal and hides it underneath a blanket.His little brother then grabs the blanket to reveal the hidden toy.It appears as though William's little brother has progressed past the:

A) preoperational period.
B) concrete operational period.
C) sensorimotor period.
D) formal operational period.