Vitamin A deficiencies could lead to
A. a decrease in rhodopsin and therefore a decrease in color vision.
B. a decrease in opsins and therefore a decrease in color vision.
C. a decrease in opsins and therefore a decrease in night vision.
D. a decrease in rhodopsin and therefore a decrease in night vision.
E. None of the above would be affected by a vitamin A deficiency.
Answer: D
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