If a Child Stops on the Shallow Side of the Visual

Multiple Choice

If a child stops on the shallow side of the visual cliff and refuses to cross the deep side,what is your most likely conclusion?

A) The child is fatigued because crawling uses much energy.
B) Depth perception prevents the child from crossing the cliff.
C) The child has been distracted by something else.
D) There is not enough incentive for the child to move.