If You Hold Your Left Hand a Few Inches in Front

Multiple Choice

If you hold your left hand a few inches in front of your nose and your right hand at arm's length. Your right hand should appear to be about half the size of your left hand. Still, you know your right hand did not suddenly shrink, because you have seen it many times at various distances. This illustrates

A) size constancy.
B) retinal disparity.
C) shape constancy.
D) the reversible figure-ground effect.