[問題]大全TEST I-18

[shena]

Critics of sales seminars run by outside consultants point out that since 1987, revenues of vacuum cleaner companies whose employees attended consultant-led seminars were lower than revenues of vacuum cleaner companies whose employees did not attend such seminars. The critics charge that for vacuum cleaner companies, the sales seminars are ill conceived and a waste of money.
Which of the following, if true, is the most effective challenge to the critics of sales seminars?

(A) Those vacuum cleaner companies whose sales were highest prior to 1987 are the only companies that did not send employees to the seminars.
(B) Vacuum cleaner companies that have sent employees to sales seminars since 1987 experienced a greater drop in sales than they had prior to 1987.
(C) The cost of vacuum cleaner sales seminars run by outside consultants has risen dramatically since 1987.
(D) The poor design of vacuum cleaner sales seminars is not the only reason for their ineffectiveness.
(E) Since 1987, sales of vacuum cleaners have risen twenty percent.

Ans:(A)

請問題目不是要weaken嗎? 我覺得選項(A)是support作者啊~

[liwuu]

A選項的意思為那些revenue高的公司,在1987前就是賣得最好的公司了...
所以1987年後是否seminar影響revenue不得而知
即表示兩者的比較基準不同!!
例如1987年後,雖然那些沒參加seminar的公司依然維持revenue比較高,不過若那些參加seminar的公司revenue逐漸增加 ,縮短前者公司的差距,那麼參加seminar還是可能有效的

[shena]

感謝大大~豁然開朗!

[Ajinaruto]

今天做了這篇大全,感覺這題心機好重
答案出在感覺最不可能的選項上(乍看之下以為是support的選項,又有only)
後來仔細幹了一下還是接受了A的答案

我來說明一下我閱讀上的理解
(A)那一些在1987年前業績最好的吸塵器公司就是那些唯一沒派員參加seminar的公司(言下之意,從1987年之後這些沒派員參加的公司就再也沒有創過更高的業績了,相對的,有派員的可能就會創出佳績,因為他說only)
這是一個[推翻文因]來weaken的選項.

[dibert8]

(E) 所有 vacuum cleaners 業績都提高 => 不去 seminar 也提高業績 (support)
(D) 終究還是 seminar 無效率 (support)
(C) 無關
(B) 去 seminar 業績下滑 (support)
(A) 最高業績在 1987 前 => 不去 seminar 之後沒有更高業績! (果然是很賊的答案)