条件是一旦鹅被射杀的5%那么狩猎季节就结束，题目说的是降低射杀鹅的限制可以使其他物种上升，但是给的答案B说自从实施这项限制，狩猎季节结束的时间提早了 已经很多年了，难道所要表达的就是说鹅越来越少，没必要降低这个标准么？ Some species of Arctic北极的 birds are threatened by recent sharp increases in the population of snow geese鹅, which breed in the Arctic and are displacing birds of less vigorous健壮的 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?
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. | 
