OG13 CR46 关于supporter assumption 和 defender assumption

46. If the county continues to collect residentialtrash at current levels, landfills will soon be overflowing and parkland willneed to be used in order to create more space. Charging each household a feefor each pound of trash it puts out for collection will induce residents toreduce the amount of trash they create; this charge will therefore protect theremaining county parkland.

Which of the following is an assumptionmade in drawing the conclusion above?

(A) Residents will reduce the amount of trash they putout for collection by reducing the number of products they buy.

(B) The collection fee will not significantly affect thepurchasing power of most residents, even if their households do not reduce theamount of trash they put out.

(C) The collection fee will not induce residents to dump theirtrash in the parklands illegally.

(D) The beauty of county parkland is an important issuefor most of the county’s residents.

(E) Landfills outside the county’s borders could be usedas dumping sites for the county’s trash.


答案 B

D E 无关选项，直接排除

B削弱 排除

疑惑点在A

个人理解的逻辑链为： fee-》reduce trash->protect parklands
A选项在说第一个逻辑推导过程：即 fee确实能 “reduce the amount of trash they putout”
关于国外网站对A的解读说是 减少购买的东西并不一定能减少产生的垃圾，我个人觉得这不是A选项的重点，A的主要意思就在于说明这个费用确实能让人们减少垃圾（不管他们是用设么方法减少的- 减少购买or反复利用之类的）

若选C，我就理解为defender assumption了，虽然也说得通，但是从题干“If the county continues to collect residentialtrash at current levels, landfills will soon be overflowing and parkland willneed to be used in order to create more space.” 所以这里的gap难道不是 fee 需要确实能减少这个垃圾产生的数量么？？？

求解啊~~~~~
感觉assumption有些类型的题目思路无法跟gmac统一啊=  =