How Can the Müller-Lyer Illusion Be Explained

How can the Müller-Lyer illusion be explained?

A) The visual cues of overlap and binocular disparity provide the illusion of a three-dimensional object.
B) We correctly perceive the two lines as being identical in length, but because of motion parallax, the illusion that one line is longer is produced.
C) We assume that the figure is moving and that the ground or frame is stationary.
D) Visual depth cues create the perception that one line is farther away from us, which leads us to perceive that line as being longer.