第一次在这里求教一道CR

fish881025

Six months or so after getting a video recorder, many early buyers apparently lost interest in obtaining videos to watch on it. The trade of businesses selling and renting videos is still buoyant, because the number of homes with video recorders is still growing. But clearly, once the market for video recorders is saturated, businesses distributing videos face hard times.

Which of the following, if true, would most seriously weaken the conclusion above?

(A) The market for video recorders would not be considered saturated until there was one in 80 percent of homes.

(B) Among the items handled by video distributors are many films specifically produced as video features.

(C) Few of the early buyers of video recorders raised any complaints about performance aspects of the new product.

(D) The early buyers of a novel product are always people who are quick to acquire novelties, but also often as quick to tire of them.

(E) In a shrinking market, competition always intensifies and marginal businesses fail.

不明白为什么选D，大家给点想法，谢谢

prayer

Six months or so after getting a video recorder, many early buyers apparently lost interest in obtaining videos to watch on it. The trade of businesses selling and renting videos is still buoyant, because the number of homes with video recorders is still growing. But clearly, once the market for video recorders is saturated, businesses distributing videos face hard times.

Which of the following, if true, would most seriously weaken the conclusion above?

(A) The market for video recorders would not be considered saturated until there was one in 80 percent of homes.

(B) Among the items handled by video distributors are many films specifically produced as video features.

(C) Few of the early buyers of video recorders raised any complaints about performance aspects of the new product.

(D) The early buyers of a novel product are always people who are quick to acquire novelties, but also often as quick to tire of them.

(E) In a shrinking market, competition always intensifies and marginal businesses fail.

不明白为什么选D，大家给点想法，谢谢

-- by 会员 fish881025 (2009/12/23 22:25:08)

文中说，许多早期的buyer已经没兴趣看了，但是selling和renting还在增加，后面说如果不继续增加了，以后distributing就困难了。

这个结论建立的前提是后面的buyer也会逐渐没兴趣的。比如开始卖了100个，然后又卖了100个，卖第二个100个的时候前面100个就没兴趣了，市场还是100个，循环下去，等到不再继续卖了，最后100个也没兴趣了，市场就消失了。

选项D的意思是，最初买的那些人是尝新鲜，玩腻了就换别的，没有忠诚度的，不代表后面增加的人也会这样，所以否定了文中结论所建立的那个假设。

fish881025

非常感谢，我也这么想过，但又觉得自己是不是想得太远，还是要多做题哦，想多远好有个分寸。