Questions 156-157 are based on the following.
Companies O and P each have the same number of employees who work the same number of hours per week. According to records maintained by each company, the employees of Company O had fewer job-related accidents last year than did the employees of Company P. Therefore, employees of Company O are less likely to have job-related accidents than are employees of Company P.
157.
Which of the following, if true, would most weaken the conclusion above?
(A) The employees of Company P lost more time at work due to job-related accidents than did the employees of Company O.
(B) Company P considered more types of accidents to be job-related than did Company O.
(C) The employees of Company P were sick more often than were the employees of Company O.
(D) Several employees of Company O each had more than one job-related accident.
(E) The majority of job-related accidents at Company O involved a single machine.
答案是B没弄懂，请指点
我的理解：
o和P公司有相同的工人并且每周工作时间相同，但是去年O公司的工作事故量少于P公司，结论：O公司的人不太可能发生工作事故。
应用它因削弱发生的事故量和发生事故的可能性之间直接推理。
它因削弱：b。p公司的工作事故的种类比o公司多。所以工作事故多。
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