Marisol Stares at an Image of the U

Multiple Choice

Marisol stares at an image of the U.S. flag with the stars black, the field around the stars yellow, and the stripes black and green. She then stares at a white sheet of paper. The afterimage of a red, white, and blue flag is explained by which theory of color vision?

A) trichromatic
B) opponent-process
C) accommodation
D) gate control