Convergence Is a Binocular Cue Based on ___

Convergence is a binocular cue based on ___.

A) the brain's ability to converge signals from both eyes into a single image
B) the feeling of a change in muscular tension required to turn the eyes inward when focusing on closer objects
C) the ability of the brain to triangulate the distance from the retina to the object
D) the detection of movement when objects are coming toward us