Why would the existence of red-green color vision deficiency support opponent process, but not trichromatic, theories of color vision?
A. Because opponent-process proposes a red-green color channel, whereas trichromatic theory proposes separate red and green receptors
B. Because opponent-process theory proposes red-blue and green-yellow channels affected by the deficiency, which trichromatic theory does not distinguish.
C. Because opponent-process theory accounts for the distribution of the three types of cones across the retina, which trichromatic theory does not
D. Because opponent process theory accounts for sensory adaptation in cones, and trichromatic theory does not
Answer: A
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