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题库 / GMATLA-CR-58
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?
Hunting limits for snow geese were imposed many years ago in response to a sharp decline in the population of snow geese.
It has been many years since the restriction led to the hunting season for snow geese being closed earlier than the scheduled date.
The number of snow geese taken by hunters each year has grown every year for several years.
As their population has increased, snow geese have recolonized wintering grounds that they had not used for several seasons.
In the snow goose's winter habitats, the goose faces no significant natural predation.
方案推理
题目： 解除禁令能使得其他的鸟类数量涨回去。
方案推理选项要与方案相关。
A 禁令是什么时候颁布的。无关
B 禁令使得打猎季提前结束，这已经是很多年以前的事情了。-- 也就是说好多年还没有达到禁令的%5的猎杀数量，捕猎季就结束了。所以现在放开禁令，也没有用，因为猎杀不到%5的最大数量。
C 好多年每年猎杀的snow geese的数目都有增长。--那解除禁令的话能够杀更多的geese，增强。
D snow geese又回到了曾经被它们弃用的越冬地。 无关
E 在越冬地，没什么天敌。 无关
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