Which of the Following Statements Regarding Colour Vision Is Correct

Multiple Choice

Which of the following statements regarding colour vision is correct?

A) Research has shown that the trichromatic theory is incorrect and the opponent-process theory is correct.
B) Research has shown that the opponent-process theory is incorrect and the trichromatic theory of correct.
C) Both trichromatic and opponent-process theories are correct;they simply describe colour processing at different steps in the visual system.
D) Researchers have shown that neither the trichromatic theory nor the opponent-process theory are correct and are still investigating the processes underlying colour processing.