prep里的一道逻辑~貌似不是很绕~我就是绕不对！唉~~

Because postage rates are rising， Home Decorator magazine plans to maximize its profits by reducing by one half the number of issues it publishes each year.The quality of articles， the number of articles published per year， and the subscription price will not change. Market research shows that neither subscribers nor advertisers will be lost if the magazine's plan is instituted.

　　Which of the following， if true， provides the strongest evidence that the magazine's profits are likely to decline if the plan is instituted？

　　（A） With the new postage rates， a typical issue under the proposed plan would cost about one-third more to mail than a typical current issue would.
【新信息，文中直说postage涨，涨多少没有说。但是从某重程度上来说，是支持原文结论，削弱“the magazine's profits are likely to decline ”。因为由于邮资高了，成本高了，所以在保证杂志年费不变的情况下，减少期刊发行的频率就是降低cost】
　　（B） The majority of the magazine's subscribers are less concerned about a possible reduction in the quantity of the magazine's articles than about a possible loss of the current high quality of its articles.
【与原文矛盾，文章说 The quality of articles, the number of articles published per year, and the subscription price will not change.  】
　　（C） Many of the magazine's long-time subscribers would continue their subscriptions even if the subscription price were increased.
【与原文矛盾，文章说 The quality of articles, the number of articles published per year, and the subscription price will not change.  】
　　（D） Most of the advertisers that purchase advertising space in the magazine will continue to spend the same amount on advertising per issue as they have in the past.
【Correct，这个说明广告商每期赞助的钱是一样的，那么期刊的issue数减半，那么广告收入必定减半。  】

是prep的原题，答案也不记得了~~

有没有做过的tx~~~帮帮忙啊！