GWD19有题不懂~急求教大牛！

傻熊有傻福

Rabbits were introduced to Numa Island
in the nineteenth century.Overgrazing by the enormous population of rabbits now menaces the island’s agriculture.The government proposes to reduce the population by using a virus that has caused devastating epidemics in rabbit populations elsewhere.There is, however, a chance that the virus will infect the bilby, an endangered native marsupial.The government’s plan, therefore, may serve the interests of agriculture but will clearly increase the threat to native wildlife.
Which of the following, if true, most seriously weakens the argument?

A.There is less chance that the virus will infect domestic animals on Numa than that it will infect bilbies.

B.There are no species of animals on the island that prey on the rabbits.

C.Overgrazing by rabbits endangers many of the plants on which bilbies feed.

D.The virus that the government proposes to use has been successfully used elsewhere to control populations of rabbits.

E.There is no alternative means of reducing the rabbit population that would involve no threat to the bilby.

答案是C~能翻译C选项是什么意思吗？

nkzhengduo

C是说兔子的过度繁殖威胁到了bilbies赖以生存的植物

hanshipeng

c 兔子的过度繁殖对bilby的生存威胁是绝对的。而用virus只是chance而已。