If our perceptual system did not follow the organizing principle of constancy,

Aexternal stimuli would be unidentifiable.
Bpeople would appear to change shape as they move in different directions.
Csensory information would be delivered to the brain in incomplete units.
Dperceptual processing would be inefficient during times of stress.

Verified Answer :

option b. people would appear to change shape as they move in different directions

perceptual system represents the distinct region of the object bearing the same color or even though there is variation in the illumination incident on them in the total amount of light energy they reflect our retinal transducers.