单项选择题

Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now listen to the passage. According to the speaker, libraries are facing the problem of ______.

A.books are in poor condition
B.having too many books from the early 1800s
C.not having enough space to store government documents
D.having to import most of the paper they use