题目：
A parent reports that his 2-year-old child often fails when running. The nurse interprets this as indicating which of the following as a normal aspect of a toddler’s vision（）
A. Near-sightedness.
B. Far-sightedness.
C. Binocular vision.
D. Strabismus.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：B
