State X recently decided to cut state funding for the public library system in County X. To help counteract this cut
in funding, the county library system has increased library late fees from $.10 per day to $.12 per day. Since the
fee increase, library administrators have seen no decline in the number of overdue books. The director of the
county library system concludes that the fee hike has helped to counteract the cut in state funding.

Which of the following statements, if true, most strengthens the director's claim?

A. Since the fee increase, library administrators have noted a significant decrease in the number of books borrowed
each day.
B. The library system incurred minor costs to make its visitors aware of the late fee increase.
C. Since the fee increase, there has been no significant change in the average number of days that books are
overdue before they are returned.
D. The library system in County X tracks its books through a very advanced database system, allowing library
administrators to have access to very accurate statistics on the number of overdue books at any given time.
E. Since the reduction in state funding, the library system in County X has eliminated 10% of its staff, creating a 2%
reduction in costs.