Which of the following best describes the process of color processing?

A) The Young-Helmholtz theory is correct.
B) The opponent-process theory is correct.
C) The Young-Helmholtz theory and the opponent-process theory are correct.
D) Neither the Young-Helmholtz theory nor the opponent-process theory are correct.

The full process of color processing involves both the Young-Helmholtz theory (which explains how color information is initially detected by cones in the retina in terms of their sensitivity to different wavelengths of light) and the opponent-process theory (which explains how color information is further processed in the brain by pairs of neurons that respond in an opposing fashion to different color wavelengths). Both theories are necessary to fully understand color processing.