To reduce productivity losses from employees calling in sick, Corporation Ximplemented a new policy requiring employees to come into work unless they wereso sick that they had to go to a doctor. But a year after the policy was implemented, astudy found that Corporation X’s overall productivity losses due to reportedemployee illnesses had increased.
Which of the following, if true, would best explain why the policy produced thereverse of its intended effect?

A. After the policy was implemented, employees more frequently went to thedoctor when they felt sick.

B. Before the policy was implemented, employees who were not sick at all oftencalled in sick.

C. Employees coming into work when sick often infect many of their coworkers.

D. Unusually few employees became genuinely sick during the year after thepolicy was implemented.

E. There are many other factors besides employee illness that can adversely affectproductivity