PREP07 CR 第10题，求解

qzw88888

Jennifer:  Video rental outlets in Centerville together handled 10,000 fewer video rentals in 1994 than in 1993.  The decline in rentals was probably due almost entirely to the February 1994 opening of Videorama, the first and only video rental outlet in the area that, in addition to renting videos, also sold them cheaply.

Brad:  There must be another explanation:  as you yourself said, the decline was on theorder of 10,000 rentals. Yet Videoramasold only 4,000 videos in 1994.

Which of the following, if true,would most seriously weaken the force of the objection that Brad presents to Jennifer's explanation?

(A)In 1994 Videorama rented out more videos than it sold
(B)In 1994 two new outlets that rent but that do not sellvideos opened in Centerville.

(C)Most of the video rental outlets in Centerville rentvideos at a discount on certain nights of the week.

(D)People often buy videos of movies that they have previouslyseen in a theater.

(E)People who own videos frequently loan them to theirfriends.

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答案是E，我也明白为什么E weaken,可是我觉得A也是对的。 1994年卖出了4000 videos,可是租出去的比卖出去的多，那这个4000不就没有意义了么，不是也可以weaken么？
请问A为什么不对呢？谢谢

francoisyang

1. Videorama卖了4k，租了>4k，但总量下降10k，说明其他商家租了下降了至少18k，必定有其他原因，所以不是weaken
2. 即使真的有weaken，原文问的是most seriously weaken

qzw88888

francoisyang 发表于 2013-7-2 13:23
1. Videorama卖了4k，租了>4k，但总量下降10k，说明其他商家租了下降了至少18k，必定有其他原因，所以不是w ...

谢谢亲，我忽略了“总量together"这个概念，所以怎么也想不通，现在明白了。