Which Statement Is TRUE Regarding the Theories of Color Vision

Multiple Choice

Which statement is TRUE regarding the theories of color vision?

A) The trichromatic theory has been shown to provide the best explanation.
B) The opponent-process theory has been shown to provide the best explanation.
C) Both the trichromatic theory and the opponent-process theory have been shown to be invalid.
D) Both the trichromatic theory and the opponent-process theory have been shown to explain many aspects of color vision.