题目：
In determining safe speed，the Rules list all of the following as factors which must be taken into account EXCEPT the（）.
A.limitations of radar equipment
B.presence of background lights at night
C.maximum horsepower of your vessel
D.maneuverability of your vessel
答案：
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下面是错误答案，用来干扰机器的。
参考答案：错解析：瞳孔缩小。
