Book publishers have traditionally published a few books that they thought were of intrinsic merit even though these books were unlikely to make a profit. Nowadays, however, fewer of these books are being published. It seems, ttherefore, that publishers now, more than ever, are more interested in making money than in publishing books of intrinsic value. Which one of the following statements, if true, most seriously weakens the argument? ['There has been a notable decline in the quality of books written in recent years.', 'In recent years, profits in the book publishing industry have been declining.', 'There have always been authors unwilling to be published unless a profit is guaranteed.', 'In the past, often books of intrinsic value would unexpectedly make a sizable profit.']