OG10-157

玫牡昙

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
正确选项是b，为什么说P公司的事故类型多于O公司，就能weak the conclusion?

stevexdx

应该是说P公司把更多类型的事故归于job-related事故，因此看起来比O公司（不把某些类型的事故算进总数）发生事故要多。

要点是比较范围（标准）不一致，导致结论被削弱。

玫牡昙

谢谢stevexdx，我懂啦~