It Seems Inefficient to Need to Rely on So Many

It seems inefficient to need to rely on so many different cues for depth perception. Why, then, do we have so many disparate cues?

A) We use different cues in different situations.
B) We are born with the ability to use some cues, but others have to be learned.
C) Although we have many cues, they are all served by the same neural area, which is efficient.
D) Some of the cues are always more accurate than other cues.