Answer: The library's holdings increased from 4 million books last year to 4.2 million this year.
The main point that Joshua is trying to make is that the entire community depends on library programs, and that these are threatened if funding is reduced. Options A, B and D discuss library programs, as well as the people who use them. However, option C does not address either one of these topics. It only talks about the number of library holdings, which is irrelevant to the services.