The books I wanted, at the public library, were always out.
选项：

A: In the entire stack of literature, there are less than 50 books which may be very special or distinctive.
B: The books I wanted were often not on the shelves of the library or out on loan.
C: It has been an advantage during my writing career that I have finished a great amount of my writing without the assistance of a library.
D: When I think of reading of books, I recall how difficult it was to obtain those