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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.
A. 对雪雁的捕杀限制在多年前就已经推行，以应对雪雁数量的急剧减少（无关）
B.由禁令所导致的猎季提早结束已经过去了很多年（但雪雁数量每减少，显然解除禁令没有用，削弱）
C.过去的几年里雪雁被猎人捕杀的数量逐年上升（无关）
D.随着雪雁数量的增加，雪雁已经在几个季节没有使用过的越冬地重新定居（无关）
E.在雪雁的冬季栖息地，雪雁不会面临明显的自然捕食。（无关）
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