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题库 / Prep2012-CR-47
Mayor: Migrating shorebirds stop at our beach just to feed on horseshoe-crab eggs, a phenomenon that attracts tourists. To bring more tourists, the town plans to undertake a beach reclamation project to double the area available to crabs for nesting.
Birdwatcher: Without a high density of crabs on a beach, migrating shorebirds will go hungry because shorebirds only eat eggs that a crab happens to uncover when it is digging its own nest.
Which of the following, if true, would provide the mayor with the strongest counter to the birdwatcher's objection?
Every year a certain percentage of crabs are caught by fishermen as bait for eel traps.
Horseshoe crabs are so prolific that given favorable circumstances their numbers increase rapidly.
On average, tourists who come to the town in order to watch birds spend more money there than tourists who come for other purposes.
The additional land made available by the reclamation project will give migrating shorebirds more space.
Some of the migrating shorebirds make only one stop during their migration from South America to Canada.
cr
题干后半段关注在crab density和“migrating shorebirds will go hungry”的矛盾，那么答案应该同样关注这个矛盾，而不是其他，有new info来解决了这个矛盾，就是正确选项；
按这个思路；ace都无关
错选了b，b说了另一个好处，但是并没有直接解决上面的矛盾， 矛盾仍然存在，甚至有点跑题；这种迷惑选项在cr中很多；
注意
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