According to the Textbook, Which of the Following Statements Is

According to the textbook, which of the following statements is most likely true about the future of e-books?

A) The sales of e-books will probably level off at 5 percent of U.S. book sales.
B) The sales of e-books will likely drop as the fad passes.
C) Over half of all U.S. book sales will be e-books by 2015.
D) Over half of all U.S. book sales will be e-books by 2017.
E) Publishers will probably stop producing print books by 2012.