Refer to the Figure

Refer to the figure.
In this figure, why might the top horizontal line appear to be longer than the bottom line?

A) Relative height makes the top line appear closer, which means it must be longer.
B) Linear perspective makes the top line appear farther away, which means it must be longer.
C) Relative size makes the top line appear closer, which means it must be longer.
D) Binocular disparity makes the top line appear farther away, which means it must be longer.
E) Motion parallax makes the top line appear farther away, which means it must be longer.