Charlene Sees Her Boyfriend Across Campus and Waves

Charlene sees her boyfriend across campus and waves.Even though the image he projects on her retina from that distance is quite small, Charlene does not perceive him to have shrunk at all.Instead, she perceives him as far away because of

A) the light-from-above heuristic.
B) algorithmic thinking.
C) experience-dependent plasticity.
D) size constancy.