请教一道逻辑题

xingxc11

100.
Brochure:  Help conserve our city’s water supply.  By converting the landscaping in your yard to a water-conserving landscape, you can greatly reduce your outdoor water use.  A water-conserving landscape is natural and attractive, and it also saves you money.
Criticism:  For most people with yards, the savings from converting to a water-conserving landscape cannot justify the expense of new landscaping, since typically the conversion would save less than twenty dollars on a homeowner’s yearly water bills.

Which of the following, if true, provides the best basis for a rebuttal of the criticism?
A. Even homeowners whose yards do not have water-conserving landscapes can conserve water by installing water-saving devices in their homes.
B. A conventional landscape generally requires a much greater expenditure on fertilizer and herbicide than does a water-conserving landscape.
C. A significant proportion of the residents of the city live in buildings that do not have yards.
D. It costs no more to put in water-conserving landscaping than it does to put in conventional landscaping.
E. Some homeowners use more water to maintain their yards than they use for all other purposes combined.

jackie19881102

选B。
B里面说传统的landscape会在fertilizer和herbicide这两方面花费比water-conserving更多的钱，那也就是说我如果装了water-saving devices，就会save money，也就是对criticism的强烈weaken和对brochure的strengthen
我不是什么大牛，但还是希望能帮到你。

zjsxsj

应该是改装成water-conserving landscape，才save money 吧，不是装了water-saving devices

xingxc11

恩 是的 那为什么不选D呢？

xingxc11

选B。
B里面说传统的landscape会在fertilizer和herbicide这两方面花费比water-conserving更多的钱，那也就是说我如果装了water-saving devices，就会save money，也就是对criticism的强烈weaken和对brochure的strengthen
我不是什么大牛，但还是希望能帮到你。

-- by 会员 jackie19881102 (2011/7/24 17:35:33)

那为什么不选D呢？

xingxc11

应该是改装成water-conserving landscape，才save money 吧，不是装了water-saving devices

-- by 会员 zjsxsj (2011/7/24 18:24:45)

恩 是这样 那D有什么错误呢？

helenlife

Criticism holds that the savings from converting to a water-conserving landscape from a conventional landscape is very small,  the difference of bill is only 20 dollars per year.

While D) is comparing the cost difference between setting up a water-conserving landscape and setting up a conventional landscape.  It has nothing to do with the criticism.

Because the criticism emphasize on the result of conversion. Anything happened prior to the conversion is out of scope.

zjsxsj

6楼说的对，原文是指从conversion的cost,而不是指装这两个装置时的cost，无关选项

balapupu

可不可以这么理解，Criticism承认按装water-conserving landscaping 比conventional landscaping省钱，但是省的那20块钱，不足以支付新的landscaping的其他费用。D只不过是再度重申了装water-conserving landscaping 比conventional landscaping省钱。没有削弱Criticism的主要反驳Brochure的点。