You Are Asked to Look Through an Opening into What

Multiple Choice

You are asked to look through an opening into what appears to be an ordinary room that has a small boy standing in the left corner. As the boy walks from the left corner to the right corner, he appears to grow very large. You have just experienced the illusion created by

A) retinal disparity.
B) the Gestalt principle of contiguity.
C) physiological nystagmus.
D) the Ames room.