According to Piaget,a child in stage five of sensorimotor development is like a:

A) child in the "terrible twos."
B) childish teenager who wants his way all of the time.
C) perfectionist who must do everything right.
D) scientist who experiments to see what will happen.

Piaget described stage five sensorimotor development as the period of "tertiary circular reactions" in which children become like little scientists, actively experimenting with their surroundings to see what will happen. They begin to develop problem-solving skills and can use trial and error to reach solutions. This description best matches choice D, a scientist who experiments to see what will happen. None of the other choices accurately capture the characteristics of a child in this stage.