Question ID:PT92 S1 Q25 Passage:The rise of book megastores in the 1990s increased sales of best-sellers, but decreased sales of less commercial, more literary books. In 1986, best-selling hardcover titles accounted for about 7 percent of all hardcover sales. By 1996, that figure had nearly doubled. Megastores can offer deeper discounts than independent stores and offer their biggest discounts on best-selling hardcovers, which discourages sales of other hardcovers. Stem:Which one of the following, if true, most weakens the argument? Correct Answer Choice:CChoice A:Bookstore customers are more likely to purchase a book that they have seen on a best-seller list than one that they have not. Choice B:In the 1990s, bookstore customers' most frequent purchases were books written by authors who had already written at least one best-seller. Choice C:In the 1990s, less commercial, more literary works increasingly had their initial publication in paperback editions rather than hardback editions. Choice D:By 1996, there were about 20 percent more titles in print than in 1986. Choice E:Books that are not expected to be best-sellers are featured more often in independent bookstores than in book megastores.