A Child in the Early Sensorimotor Period Is Shown a Ball

A child in the early sensorimotor period is shown a ball, which she watches intensely. The ball is then hidden under a pillow. What will the child do?

A) ask, "Where is the pillow?"
B) stare at the pillow but not pick it up
C) move the pillow and pick up the ball
D) ignore the pillow, as if the ball didn't exist