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题目材料：
Ten years ago off Garnea Island, large numbers of sea turtles were being trapped and drowned in commercial shrimping nets, and the sea-turtle population was rapidly declining. A law was passed requiring shrimping nets to have special flaps that enable trapped turtles to escape. Initially, compliance was strictly monitored, and sea-turtle deaths fell dramatically. In recent years, however, boats are monitored less frequently, and sea-turtle deaths have significantly increased. Clearly, therefore, compliance has decreased.
Which of the following, if true, most strengthens the argument?
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A.The local shrimping industry, which ten years ago employed fewer than 5,000 people, now employs over 15,000 people and is one of the largest industries in the region.
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B.In the months in which shrimping is banned to enable shrimp to grow, sea-turtle deaths have changed little in the last six years.
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C.Officials responsible for overseeing compliance with the law contend that over 70 percent of shrimpers have the required flaps in their nets.
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D.Because of the number of small boats involved in shrimping, thorough monitoring is both difficult and expensive.
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E.Marine biologists credit the law with almost tripling the size of the local sea-turtle population within six years of passage.
D显示答案
