GWD 3-Q17

100. (31888-!-item-!-188;#058&006228) (GWD 3-Q17)

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.

答案是B,没看懂问题,请NN们解释一下~

非NN

这题可以看成对Criticism的反驳的WEAKEN 题。

题目的意思是 savings from converting to a water-conserving landscape cannot justify the expense of new landscaping。

WEAKEN 给出他因。B. A conventional landscape generally requires a much greater expenditure on fertilizer and herbicide than does a water-conserving landscape.

感觉D也对啊？帮忙解答一下。。。