Ten-Month-Old Mattel Wants to Get Across the Room to Reach

Multiple Choice

Ten-month-old Mattel wants to get across the room to reach a favorite toy. He figures out that rolling over doesn't really get him where he wants to go, but pulling himself along on his belly does. Mattel's behavior can best be explained in terms of

A) dynamic systems perspective.
B) lateralization.
C) the proximodistal principle.
D) developmental norms.