Which Statement BEST Describes Texture Gradient That Serves as a Cue

Which statement BEST describes texture gradient that serves as a cue to depth?

A) Moisture and particles in the air scatter light, which makes objects appear increasingly hazy with distance.
B) The impressions created by stones in a dry riverbed are fairly regular in size and spacing, and the retinal image size of these equal-size features decreases as their distance increases.
C) The top and bottom edges of the train appear to converge and project a smaller retinal image as it recedes from an observer.
D) The objects and surfaces, near the point toward which you are driving, move outward slowly in your retinal image.