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?
文章结论说政府这样做是因为保护农业而危害野生动物。那weaken的选项大多都是反过来说，也就是政府这样做其实也是处于保护野生动物的角度出发的。
选项分析：
A 家养的动物感染的几率低于兔子，无关；
B 岛上没有其他动物吃兔子，无关；
C 把这些兔子除掉以后有种植物就会存活了，而濒临灭绝的bilby动物就是吃这种植物的，可以推出消灭一些兔子对此野生动物有好处，正确；
D 无关elsewhere；
E 原文复述，而weaken题要求的是非原文，而是来自外部的假设；
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