Which of These Is an Example of an Unconscious Inference

Which of these is an example of an unconscious inference we make about the world?

A) When we see an image of a cat crossing some railroad tracks, we are uncertain whether the converging lines indicate distance.
B) When we see an image of pencils in an opaque jar, the jar and the pencils blend in a single retinal image that is of consistent size.
C) When we see an image of pencils in an opaque jar, we understand that parts of the pencils are inside the jar even though we cannot see those parts.
D) When we see an image of a cat crossing some railroad tracks, we process the cat and the tracks in one retinal image.