The total number of book titles published annually in North America has approximately quadrupled since television first became available. Retail sales of new titles, as measured in copies, increased rapidly in the early days of television, though the rate of increase has slowed in recent years. Library circulation has been flat or declining in recent years.

Question: Which one of the following is most strongly supported by the information above?
Options:
A. Television has, over the years, brought about a reduction in the amount of per capita reading in North America.
B. The introduction of television usually brings about a decrease in library use.
C. Book publishers in North America now sell fewer copies per title than they sold in the early days of television.
D. The availability of television does not always cause a decline in the annual number of book titles published or in the number of books sold.
E. The introduction of television expanded the market for books in North America.
Answer: "D"