Researchers Who Have Studied Color Blindness and Color Deficiency Have

Multiple Choice

Researchers who have studied color blindness and color deficiency have found that:

A) total color blindness is extremely rare in animal species.
B) total color blindness in humans usually occurs when cones of the retina are absent or malfunctional.
C) blue-yellow color blindness is the most common form of color deficiency.
D) color deficiency is more frequently found in women than in men.