TOEFL Reading: ETS-TOEFL阅读机经 - ZZ3Y1594O17R5YT1L$

The author mentions "Vespasiano da Bisticci" in order to emphasize A. the process by which stationers obtained the necessary materials for book production B. the equal importance of Florence and Paris in the rapidly developing book industry C. the superiority of Florentine libraries to those in other European cities D. that making books was a commercial enterprise in Europe before the invention of printing