An overwhelming proportion of the most productive employees at SaleCo's regional offices work not eight hours a day, five days a week, as do other SaleCo employees, but rather ten hours a day, four days a week, with Friday off. Noting this phenomenon, SaleCo's president plans to increase overall productivity by keeping the offices closed on Fridays and having all employees work the same schedule-ten hours a day, four days a week.
P : Productive employees work ten hours a day, four days a week, with Friday Off
A : Difference required for working hours according to specific jobs performed can be ignored.
C : Increase overall productivity by enforcing other employees to follow the above-mentioned schedule.
Which of the following, if true, provides the most reason to doubt that the president's plan, if implemented, will achieve its stated purpose?
(A) Typically, a SaleCo employee's least productive hours in the workplace are the early afternoon hours.
-> Irrelevant. The argument did not mention anything about when the working hours are during a day.
(B) None of the employees who work four days a week had volunteered to work that schedule, but all were assigned to it by their supervisors.
-> Irrelevant. Whether employees volunteered or not does not matter. The premise is only providing information that such working hours were very productive.
(C) Working ten hours a day has allowed the most productive employees to work two hours alone each day in their respective offices relatively undisturbed by fellow employees.
-> Correct. If most of the employees in the company are forced to work in the same schedule, the above-mentioned advantage, which abled employees to be more productive, will be disappeared.
(D) Employees at SaleCo are compensated not on the basis of how many hours a week they work but on the basis of how productive they are during the hours they are at work.
-> Irrelevant. The argument is not talking about compensation policy.
(E) Those SaleCo employees who have a four-day workweek do not take any of their office work to do at home on Fridays.
-> Irrelevant. The premise already mentioned that the most productive employees do not work on Fridays. Moreover, no information is given to determine whether works done outside the company are included in productivity calculation.