How Can Psychologists Determine What the World Looks Like to a Red-Green

How can psychologists determine what the world looks like to a red-green color-blind person?

A) Ask a person with red-green color vision deficiency to describe what he or she sees.
B) Ask someone who is red-green color blind in one eye to describe what he or she sees.
C) Study the pattern of light that reflects off the retina of the person with color vision deficiency.
D) Record the brain waves from an area of the scalp over the occipital lobe.