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 eclectic 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 eclectic 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.
为什么选b? | 
