The Young-Helmholtz Trichromatic Theory of Colour Vision Assumes That

The Young-Helmholtz trichromatic theory of colour vision assumes that:

A) there are three types of colour receptors in the retina, each of which is most sensitive to one of three wavelengths of light
B) aspects of the dual-process theory and the opponent-process theory are combined to explain colour vision
C) colour is determined by feature detectors in the visual cortex, each of which responds to two different wavelengths
D) there are three types of colour receptors in the retina, each of which responds to two different wavelengths