If You Hold a Round Plate in Your Hand and Turn

Multiple Choice

If you hold a round plate in your hand and turn it from side to side, the image it casts on your retina changes. Yet you still perceive the plate to be round. This phenomenon can be explained by the principle of

A) brightness constancy.
B) shape constancy
C) size constancy.
D) retinal disparity.
E) binocular constancy.