Each year red-winged black birds stop in a certain region og 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. Nertheless, the wild agency approved the permits. Which of the following, if true, most helps to justify the wildlife agency's approval of the permits? A.In the region where the red-winged blackbirds stop, they are the first birds to be present in the spring.答案是选这一项。 C.Since rice is not raised in Midland province, few species of bird native to the province normally eat rice.为什么不选C呢？我觉得C应该是最直接的原因吧， | 
