请教 OG 12 中 CR 32

robbinpeng

The Eurasian ruffe, a fi sh species inadvertently introduced into North America’s Great Lakes in recent years,
feeds on the eggs of lake whitefi sh, a native species, thus threatening the lakes’ natural ecosystem. To help
track the ruffe’s spread, government agencies have produced wallet-sized cards about the ruffe. The cards
contain pictures of the ruffe and explain the danger they pose; the cards also request anglers to report any ruffe
they catch.
Which of the following, if true, would provide most support for the prediction that the agencies’ action will have
its intended effect?
(A) The ruffe has spiny fi ns that make it unattractive as prey.
(B) Ruffe generally feed at night, but most recreational fi shing on the Great Lakes is done during daytime hours.
(C) Most people who fi sh recreationally on the Great Lakes are interested in the preservation of the lake
whitefi sh because it is a highly prized game fi sh.
(D) The ruffe is one of several nonnative species in the Great Lakes whose existence threatens the survival of
lake whitefi sh populations there.
(E) The bait that most people use when fi shing for whitefi sh on the Great Lakes is not attractive to ruffe.

答案选C。这里我觉得有一个逻辑：那些为了获奖的人，他们为了不让whitefish减少，所以就会举报吃whitefish的ruffe。但是他们减少了ruffe，只是让whitefish总数提高了，而并没有让他们中奖的几率提高吧？

wangsiwei

我觉得吧，他们不是在乎获奖，他们只是特在乎他们的鱼。这个中将概率无关吧。

fatpotato

这题我是这样理解的：
题目问哪个选项中陈述的事实 可以说明 这个应对政策是有效果的
A说r有刺，人们不愿意抓r，那么这个政策出台后，人们还是没有motivation去抓r，虽然r有很多坏处，但是抓它会给抓鱼的带来不便。
B同A的道理，人们不会为了抓r而改变自己的抓鱼习惯，改在晚上出来专门抓r
C就对了，因为人们要抓lw，而如果r们不死，lw可能就被它们吃光了，lw减少会损害到人们的利益，所以人们有动机抓r
D和E看上去就没啥关系。。。

livia2012

同意楼上的，正好看到这道题目。C主要是说lw可以给人带来利益，如果不抓r则lw都被吃完，则人们得不到利益了，故要抓r

fanzhengjiushi

原文的结论是行为有效，这个行为是政府为了追踪ruffe的足迹，制造了card。card有2个作用，1是contain picture，2是要求钓鱼者反馈捕鱼信息。加强结论就可以了。


A选项ruffe作为被捕者没有吸引力，那么钓鱼者就会少捕，信息就会少反馈。这个行为则效果不明显。
B选项RUFFLE吃东西是在晚上，钓鱼者在白天钓鱼，同A，钓鱼者就会少捕，信息就会少反馈。
C选项的prized不是中奖，是有价值的。楼主说的他们举报RUFFLE的越多，表明信息反馈的越多，加强结论，证明行为有效。
D是无关选项。并不能加强或者削弱。
E选项诱饵对于ruffle的吸引力不大，同A，钓鱼者就会少捕，信息就会少反馈。