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【单选题】
某市某繁华街道“十字路口可见度改善工程”竣工使用后，有关它对交通事故预防效果的两份调查报告出台了。 第一份报告的结论是：此项工程改善了此十字路口的能见度，从而大大减少了那里的交通事故的发生。 第二份报告的结论是：此项工程完工后，每周交通事故增加了而不是减少了，因此，此项I程增加了事故发生的几率。 以下对于评价第二份报告的论述最有用的选项是______。
A.
工程完工后，在十字路口处值勤的交警员平均值勤时间是多少
B.
工程竣工使用后，作为该市最为繁忙的十字路口之一，车流量的改变情况如何
C.
邻近城镇在改善危险路段可见度方面采取了什么样的措施
D.
工程完工后，该十字路口是否会不便于行人通过
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