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, ttherefore, 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 are no species of animals on the island that prey on the rabbits.
B: The virus that the government proposes to use has been successfully used elsewhere to control populations of rabbits.
C: Overgrazing by rabbits endangers many of the plants on which bilbies feed.
D: There is no alternative means of reducing the rabbit population that would involve no threat to the bilby.
Choose A, B, C or D as your solution.
C