[求助]prep 45

45.   (33847-!-item-!-188;#058&007123)

A major impediment to wide acceptance of electric vehicles even on the part of people who use their cars almost exclusively for commuting is the inability to use electric vehicles for occasional extended trips.  In an attempt to make purchasing electric vehicles more attractive to commuters, one electric vehicle producer is planning to offer customers three days free rental of a conventional car for every 1,000 miles that they drive their electric vehicle.

Which of the following, if true, most threatens the plan's prospects for success?

(A) Many electric vehicles that are used for commercial purposes are not needed for extended trips.

(B) Because a majority of commuters drive at least 100 miles a week, the cost to the producer of making good the offer would add considerably to the already high price of electric vehicles.

(C) The relatively long time it takes to recharge the battery of an electric vehicle can easily be fitted into the regular patterns of car use characteristic of commuters.

(D) Although electric vehicles are essentially emission-free in actual use, generating the electricity necessary for charging an electric vehicle's battery can burden the environment.

(E) Some family vehicles are used primarily not for commuting but for making short local trips, such as to do errands.

我不太明白这道题目的第一句话对整个文章有什么作用。是指出V是用于长途开车吗？我觉得对于题干问的究竟要削弱什么，不是很清楚，是说要削弱“促销”这个目的，还是削弱“长途用”这个目的。我选了A，答案是B。

希望帮忙讨论解释下！

这道题呢，说电动车(好想翻译成电瓶车-_-!!)卖不好是因为不能用做长途的旅行用 （因为要充电嘛）。所以为了吸引顾客，producer就offer说每开1000miles，可以免费租3天一般的车（用做旅行etc.）。

producer的愿意是要弥补电动车的缺点。

B中说，顾客每个星期开100miles,那10个星期就可以达到1000miles换免费租车的标准了。因此对producer来说，这个offer的cost是非常大的。这个增加的cost最终还是到电动车的价格里去的，所以就会导致电动车的价格更高。

现在本来就少人买了，价格更高不是更少人买吗....所以threaten这个plan了

发现我好婆婆妈妈....

谢谢啊！我真的没有联想到这个“电瓶车”的缺点是不能开长途，以为是司机的选择习惯。于是我在这个“用于长途”的理解上绕来绕去。B我理解了，那A有没有削弱的意思呢，或者说A与这个促销手段内容无关？