Mary Hides Ramy's Favorite Toy Under a Blanket While Ramy

Multiple Choice

Mary hides Ramy's favorite toy under a blanket while Ramy watches. Ramy removes the blanket and squeals when he sees the toy. Mary again hides the toy, but this time under a different blanket. Even though Ramy saw where Mary hid his toy, he still looks under the first blanket before removing the second blanket and retrieving the toy. Ramy has displayed _____.

A) lack of centration
B) lack of object permanence
C) habituation
D) the A-not-B error