Which of the Following Are Not Proposed Models of Direction

Multiple Choice

Which of the following are not proposed models of direction sensitivity in the primary visual cortex?

A) stimulus from one region in space arrives in faster or slower than in another region of space
B) cortical neurons inhibit each other when they are on one side, but not the other of their receptive field
C) eye saccades only move in one direction and there for input from the LGN, via the retinal cells is directional
D) all of the above