单项选择题

Questions 14 ~ 16 are based on the following talk on library rules. You now have 15 seconds to rend Questions 14 ~ 16.
Why can’t the library issue library cards to everyone who applies

A.Because it takes too long to process all the applications.
B.Because it is a library for special purpose.
C.Because its resources are limited.
D.Because there is a shortage of staff.