With Respect to the Trichromatic and the Opponent-Process Theories of Color

Multiple Choice

With respect to the trichromatic and the opponent-process theories of color perception,which of the following statements is most accurate?

A) The trichromatic theory has largely been discredited.
B) The opponent-process theory has largely been discredited.
C) Trichromatic process works within the retina itself; whereas opponent mechanisms operate both in the retina and at later stages of neuronal processing.
D) The opponent-process theory describes color processing early in the visual system; trichromatic theory describes color processing later on in the visual system.