CR OG Diagnostic-CR 34

life2011GMAT

34. A year ago, Dietz Foods launched a yearlong advertising campaign for its canned tuna. Last year Dietz sold 12 million cans
of tuna compared to the 10 million sold during the previous year, an increase directly attributable to new customers
brought in by the campaign. Profits from the additional sales, however, were substantially less than the cost of the
advertising campaign. Clearly, therefore, the campaign did nothing to further Dietz’s economic interests.
Which of the following, if true, most seriously weakens the argument?
(A) Sales of canned tuna account for a relatively small percentage of Dietz Foods’ profits.
(B) Most of the people who bought Dietz’s canned tuna for the first time as a result of the campaign were already loyal
customers of other Dietz products.
(C) A less expensive advertising campaign would have brought in significantly fewer new customers for Dietz’s canned
tuna than did the campaign Dietz Foods launched last year.
(D) Dietz made money on sales of canned tuna last year.
(E) In each of the past five years, there was a steep, industry-wide decline in sales of canned tuna.

Ans (E)

对答案E ,没有问题.

这道题我做错了,选了C. 解释说此选项不削弱,也不加强. 我是这么理解的. 更便宜的 campaign 会导致更少的新客户,那不就是说去年的campaign 还是有作用么.应该可以削弱文章中的结论的阿?

请问我哪里理解有问题.

谢谢.

anniecomet

关键是 profits= sales- costs

如果是C， 便宜的campaign导致costs减少，sales也减少了。。

比如 the current campaign的条件下 sales=5  costs=4, then profits=1

如果换便宜的 sales turn to 4  costs turn to 3, then profits=1

所以，no strenthen no weaken

life2011GMAT

关键是 profits= sales- costs

如果是C， 便宜的campaign导致costs减少，sales也减少了。。

比如 the current campaign的条件下 sales=5  costs=4, then profits=1

如果换便宜的 sales turn to 4  costs turn to 3, then profits=1

所以，no strenthen no weaken

-- by 会员 anniecomet (2011/4/30 16:23:33)

对哦， 我忽略了这个关键词， 每想到栽倒这么简单的提上。

谢谢啊！