The police department of Carnelia recommends uniformed officers for promotion to the detective level only when an officer both has passed the detective certification test and has been subjected to a "background check" by a department-appointed impartial review committee. This rule is intended to save department money that would otherwise be spent on detective training for officers who would be ultimately dismissed based on discoveries about their backgrounds. The department has recently abandoned the use of the review committee in order to reduce its costs.

Which of the following, if true, provides the best justification for the police department's decision to abandon the review committee?

(A) Detectives with unfavorable backgrounds, such as those with criminal records, sometimes work for several years before these backgrounds are discovered and they are dismissed.

(B) Some police detectives have backgrounds that they want to remain private, even though nothing in these backgrounds is grounds for dismissal from their positions.

(C) Virtually every officer whose background is reviewed is promoted to detective, and the impartial review committee is a major expense for the department.

(D) The impartial review committee's "background check" does not prevent those who want to be promoted from protecting their financial and occupational records.

(E) The length of time granted to the impartial review committee is directly proportional to the expected cost of detective training for a given police officer.

[spoiler]OA C; why A wrong[/spoiler]