单选题 A 58-year-old client complaining of difficulty driving at night states that the "lights bother my eyes" even though he wears corrective glasses. The nurse would suspect that the client is experiencing a deficiency in which of the following vitamins?
A. Vitamin Ａ.
B. Vitamin Ｂ complex.
C. Vitamin Ｅ.
D. Vitamin Ｃ.

【正确答案】 A

【答案解析】Vitamin A is important for the eye's ability to see color. The B complex vitamins play a role in many functions, including nerve conduction. Vitamins E and C have antioxidant properties and aid in wound healing.