Which of the Following Statements Is Correct Regarding the Trichromatic

Which of the following statements is correct regarding the trichromatic and opponent-process theories of color vision?

A) Research suggests that the trichromatic theory is incorrect.
B) Research suggests that the opponent-process theory is incorrect.
C) Both theories are correct; they simply describe color processing at different steps in the visual system.
D) Researchers are still uncertain about which of the two theories is correct.