请教prep-1-45 跪谢！

beryl8

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.


答案B,  真的不太明白B为什么对，A为什么错！

bdsjb116

threaten题可以当weaken题来做 原则是: 只要对原文的结论有削弱作用就行

A：无关选项。the plan's prospects for success is to "In an attempt to make purchasing electric vehicles more attractive to commuters".和extended trips无关
B：dd considerably to the already high price of electric vehicles.证明这项举措不会达到more attractive to commuters的目的

beryl8

哦，对对对，又犯糊涂了，没看准恒定success的标准，谢谢bdsjb116, 头像很可爱！