Parland's alligator population has been declining in recent years, primarily because of hunting. Alligators prey heavily on a species of freshwater fish that is highly valued as food by Parlanders, who had hoped that the decline in the alligator population would lead to an increase in the numbers of these fish available for human consumption. Yet the population of this fish species has also declined, even though the annual number caught for human consumption has not increased.
Which of the following, if true, most helps to explain the decline in the population of the fish species?
(A) The decline in the alligator population has meant that fishers can work in some parts of lakes and rivers that were formerly too dangerous.
(B) Over the last few years, Parland's commercial fishing enterprises have increased the number of fishing boats they use.
(C) The main predator of these fish is another species of fish on which alligators also prey.
(D) Many Parlanders who hunt alligators do so because of the high market price of alligator skins, not because of the threat alligators pose to the fish population.
(E) In several neighboring countries through which Parland's rivers also flow, alligators are at risk of extinction as a result of extensive hunting.
题目分析：原文倒是很简单，明明A动物死了B动物应该会多，但是B动物数量也下降了，问怎么能解释这个现象。A说A动物数量下降能让一些渔夫在一些原来不能工作的地方工作，这个和B动物数量下降有什么关系？干掉。B说很多企业增加了捕鱼船的数量，太发散了吧，干掉。C说A动物除了吃B还会吃一种动物，而这种动物会影响到B，这不就能和B的数量下降建立练习了，留着。D说很多当地居民处于什么目的来捕猎A动物，你处于什么目的和B动物数量下滑没什么关系，干掉。E说在邻国，邻国发生什么关我什么事情，干掉。
