GWD17-Q11

TN14开始没解析了，逻辑开始纠结了。。。大侠们帮忙

Some species of Arctic birds are threatened by recent sharp increases in the population of snow geese, which breed in the Arctic and are displacing birds of less vigorous species.  Although snow geese are a popular quarry for hunters in the southern regions where they winter, the hunting season ends if and when hunting has reduced the population by five percent, according to official estimates.  Clearly, dropping this restriction would allow the other species to recover.

Which of the following, if true, most seriously undermines the argument?  d  b

A.      Hunting limits for snow geese were imposed many years ago in response to a sharp decline in the population of snow geese.

B.      It has been many years since the restriction led to the hunting season for snow geese being closed earlier than the scheduled date.

C.      The number of snow geese taken by hunters each year has grown every year for several years.

D.      As their population has increased, snow geese have recolonized wintering grounds that they had not used for several seasons.

E.       In the snow goose’s winter habitats, the goose faces no significant natural predation.

答案是B

我也做错了- -， 看了一下以前的帖子，觉得其实争议在于对B的理解，

It has been many years since the restriction led to the hunting season for snow geese being closed earlier than the scheduled date.

因为restriction而导致的比截止日早结束这种情况在许多年前就消失了

题干，只要snow geese的数量减少了5%，hunting season就结束了（e.g. 1月到3月是hunting season, 然后如果2月已经减少了5%，那么，就结束了）

选项B, 其实就是说到了3月份结束的时候也没有到5%，那么即使取消这个restriction也是没用的，起到了削弱作用。

选项D, 说have recolonized wintering grounds ，其实是个无关选项，除非你假设这样以后打不到了....

open to discussion

d 正确。其他地方不适合打猎。

d 打不到，因不在南部，则数量不减，故restriction无用也。

我觉得cllcchocolat的解释非常对.关键是要搞懂B选项的意思。B选项的意思是“因为restriction而导致的比截止日早结束这种情况在许多年前就消失了”

hunters根本打不到5%，所以即使取消5%这种restriction也没用，即削弱。