ameyagmat1989
Can someone please explain why option D is wrong.
The conclusion is - employees of Company O are less likely to have job-related accidents than are
employees of Company P.
Option D states that Several employees of Company O each had more than one job-related accident. Hence, thsi should weaken the conclusion the employees of company O are less likely to have job-related accidents
Hi
ameyagmat1989,
I am happy to respond

Though its an old post but still.
(D) Several employees of Company O each had more than one job-related accident. This option statement is talking about several employees who each had more than one job-related accident in Company O. But just on the basis of knowing these employees who each had more than one job-related accident, we cannot comment on the (overall) employees of Company O as a whole.
Though several employees had more than one job related accidents but there may be many who each had no job related accident at all. So, just on the basis of knowing these employees we cannot weaken our conclusion.
Choices D give reasons for predicting a smaller likelihood that any arbitrary employee of Company O will have a job-related accidents, and thus support the conclusion.
Also, in comparison questions, for example, as here in this question, we are comparing two companies P and O, it is more probable that those answer choices which includes both the counterparts in its explanation to be correct.Hope it clears your doubt!