Derek checks on his new car parked on the street before he goes up to his 19th floor apartment. From his apartment, he looks down and makes sure the car is still there. Even though the image of the car on his retina is smaller from where he is looking, Derek knows that the car is still as big as it was downstairs. This scenario best illustrates the phenomenon of:


(A) subliminal perception.


(B) color constancy.


(C) apparent movement.


(D) size constancy.