At night, faint objects are best seen when not looked at directly. What is the basis of this phenomenon?
A. Cone photoreceptors are most sensitive in dim light, and few cones are present in the fovea.
B. Cis-retinal builds up in the fovea at night and is degraded during the day.
C. Rod photoreceptors are most sensitive in dim light, and few rods are present in the fovea.
D. Rhodopsin is transported away from the fovea at night.
Answer: C
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