(A) The number of people for whom seeing an excerpt of a book in a magazine provides an adequate substitute for reading the whole book is smaller than the number for whom the excerpt stimulates a desire to read the book.

(B) Because the financial advantage of excerpting a new book in a magazine usually accrues to the book's publisher, magazine editors are unwilling to publish excerpts from new books.

(C) In calculating the total number of copies that a book has sold, publishers include sales of copies of magazines that featured an excerpt of the book.

(D) The effectiveness of having excerpts of a book published in a magazine, measured in terms of increased sales of a book, is proportional to the circulation of the magazine in which the excerpts are published.

(E) Books that are suitable for excerpting in high-circulation magazines sell more copies than books that are not suitable for excerpting.

答案是A

E怎么不对了？

文中说：excerpts on the high-circulation magazine-->not only a sure increase

in sales but also a fee paid by the magazine to the book's publisher

可以推出：excerpt能刺激人们去购买。

所以A对啊。

E，首先文中根本就不是在谈论suitable 还是不suitable的问题。因为文中是说

excerpt带来的好处。

   而且suitable 比not suitable sell的好，这个推不出来。文中比较的是，同一本

书，excerpt 比不excerpt的好。如果按E的推理，那就太绝对了，好像只要excerpt就

一定比其他的不excerpt的好。
这是我的理解。