As Briana drove down the highway,the pickets of the fences moved past her in a blur,but the mountains in the distance didn't appear to move at all.What was Briana experiencing

A)  binocular cue for depth called retinal disparity 
B)  monocular cue for depth called motion parallax 
C)  binocular cue for depth called convergence 
D)  pictorial cue for depth called texture gradient

Motion Parallax

A depth cue that involves the apparent relative motion of stationary objects as observed by an observer in motion.

Retinal Disparity

The slight difference in images between the two eyes due to their different positions, which contributes to binocular depth perception.

Binocular Cue

Visual information taken in by both eyes that enables perception of depth, distance, and three-dimensional features of objects.