(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

答案是A没有问题的，不过我想问一个其他的问题。

一般来说，这种在杂志上发表摘要是应该book publisher 给杂志钱啊，相当于做广告了，为什么反而是杂志要付费呢？

谢谢大家哦。

呵呵

付的是版权费

作者写的书杂志登出来作者怎么能不收钱呢

答案A为什么没问题 我觉得有问题啊

材料中说  采取这种方法能产生 a sure increse in sales

但是sales增加  并不能推出the number of ~~~ is smaller than the number of ~~

因为假定原先有5个买 10个不买

现在采取这种方法后 7个买 8个不买     

买的人数是增加了 从5到7   但是不买的人数可以比买的人多啊 8比7

1不管看没有看到杂志都想买书的

2不管看没有看到杂志都不想买书的

3本来想买书但是看到杂志就不买了

4本来不想买看了杂志后就想买了

你的这个假定有问题吧？并不是只有一定数量的潜在顾客（比如15人）。

答案a中明确地告诉了：看了杂志后，不买书的要比买书的人数少。

否则就不会：a sure increase in sales

A虽然是正确选项，但我有一点很困惑，就是做逻辑题一般是排除一些原文中没有提到的事物，但是

A中的 the number of people 原文中不是也没有提到吗？