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.

Which of the following, if true, would most weaken the conclusion above?

• AThe employees of Company P lost more time at work due to job-related accidents than did the employees of Company O.  
• BCompany P considered more types of accidents to be job-related than did Company O.  
• CThe employees of Company P were sick more often than were the employees of Company O.  
• DSeveral employees of Company O each had more than one job-related accident.  
• EThe majority of job-related accidents at Company O involved a single machine.