Each year red-winged blackbirds stop in a certain region of midland province on their spring and fall migrations. in the fall, they eat a significant portion of the province’s sunflower crop. this year midland farmers sought permits to set out small amounts of poisoned rice during the blackbirds’ spring stop in order to reduce the fall blackbird population. some residents voiced concern that the rice could threaten certain species of rare migratory birds. nevertheless, the wildlife agency approved the permits. which of the following, if true, most to justify the wildlife agency’s approval of the permits, given the concerns voiced by some residents?
a. in the region where the red-winged blackbirds stop, they are the first birds to be present in the spring. (correct -- if red-winged blackbirds are first to arrive in the region, the farmers can time the use of poisoned rice so that it can be used to poison the red-winged blackbirds only. before other migratory birds arrive, the use of posion rice can stop.)
b. the poison that farmers want to use does not kill birds but rather makes them incapable of producing viable eggs. (this will threaten the sustainability of other migratory birds)
c. since rice is not raised in midland province, few species of birds native to the province normally eat rice. (this implies that there are still some speicies even though it says few that eat the rice, thus it does not eliminate the residents' concerns over protecting other migartory birds.)
d. without the permit, any farmers shown to have set out poison for the blackbirds would be heavily fined. (does not address the residents' concerns over protecting other migartory birds.)
e. the poison that farmers got approval to use has no taste or smell that would make it detectable by birds. (this would raise the residents' concerns even more.)