Tonka Is Actively Playing with His Toy Truck When His

Tonka is actively playing with his toy truck when his mom accidentally drops a towel she is carrying directly on top of the vehicle. As soon as the vehicle is covered, Tonka turns his head away and calmly begins playing with another toy. Tonka's reaction best illustrates a lack of

A) object permanence.
B) accommodation.
C) reversibility.
D) inner speech.