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 strengthen the conclusion above?

• ACompany P manufactures products that are more hazardous for workers to produce than does CompanyO.  
• BCompany P holds more safety inspections than does Company O.  
• CCompany P maintains a more modern infirmary than does Company O.  
• DCompany O paid more for new job-related medical claims than did Company P.  
• ECompany P provides more types of health-care benefits than does Company O.