You and a Friend Are Looking at Clouds

You and a friend are looking at clouds. Your friend thinks that one cloud looks exactly
like a dog. You look at it and agree. Your perception is due to ___ , which works by ____.

A) bottom-up processing; feature analysis
B) similarity comparison; bottom-up processing
C) a figure-ground reversal; opponent processing
D) a perceptual schema; top-down processing
E) contrast effects; depth perception