An airplane engine manufacturer developed a new engine model with safety features lacking in the earlier model, which was still being manufactured. During the first year that both were sold, the earlier model far outsold the new model; the manufacturer thus concluded that safety was not the customers’ primary consideration.

Which of the following, if true, would most seriously weaken the manufacturer’s conclusion?

(A) Both private plane owners and commercial airlines buy engines from this airplane engine manufacturer.

(B) Many customers consider earlier engine models better safety risks than new engine models, since more is usually known about the safety of the earlier models.

(C) Many customers of this airplane engine manufacturer also bought airplane engines from manufacturers who did not provide additional safety features in their newer models.

(D) The newer engine model can be used in all planes in which the earlier engine model can be used.（B）

(E) There was no significant difference in price between the newer engine model and the earlier engine model.

请问D，E是不是加强，按我得理解是排除它因加强，og说得含含糊糊得

请教牛牛，谢谢

同问，我对D/E的理解：

(D) The newer engine model can be used in all planes in which the earlier engine model can be used. —>OG解释：新引擎用途多但顾客不买，说明用途的多寡不是顾客买旧产品的因素，但不能削弱“安全不是考虑因素”（我觉得有些削弱，因为既然排除了用途不是顾客购买的因素，那么安全是购买因素的可能性就会大一些）？？

(E) There was no significant difference in price between the newer engine model and the earlier engine model. —> OG解释：新旧产品价格一样但顾客仍不买，说明价格不是顾客买旧产品的考虑因素，但不能削弱“安全不是考虑因素”（我觉得有些削弱，理由同D）

顶！这题我也有疑问

1）为什么D不对？感觉也是削弱。og解释说Choice D and E suggest that usability（并非safety啊) and price, respectively, were not the customers’ primary consideration in favoring the earlier model,

2）另外有nn说过逻辑的选项中只可能有一个是正确答案，不存在谁比谁更好。对这种说法表示质疑，不少正确选项也存在程度好坏。

我不是nn,不知说的对不对，请大家讨论。

New model有老moel没有的安全特性，但在第一年的销售中，老model的销量远超过new model,

——〉安全不是顾客考虑的主要因素

我觉得D,E是有点加强，因为排除了推理前提中老model的销量远超过new model的他因，即价格和使用范围不是影响销量的因素，那么如果顾客主要考虑安全的话就应该多买new model,但题干中说了有安全特性的new model的销量反而低，就说明安全不是顾客购买的主要因素，即推出了结论。

而B中说顾客认为老model更安全，所以提供了其他原因来说明老model的销量远超过new model，所以是weaken.

同意同意！！！

我也开始选的D