Shaun Holds His Finger Up in Front of His Eyes

Multiple Choice

Shaun holds his finger up in front of his eyes at arm's length and focuses on the image. He slowly moves the finger toward his eyes, focusing his eyes to maintain a single image. As he does this, Shaun experiences muscular tension in his eyes. This is an example of which depth perception cue?

A) retinal disparity
B) shadowing
C) convergence
D) relative size
E) interposition