GWD19-14

Q14:

The Eurasian ruffe, a fish species inadvertently introduced into North America’s Great Lakes in recent years, feeds on the eggs of lake whitefish, 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?

1. The ruffe has spiny fins that make it unattractive as prey.

2. Ruffe generally feed at night, but most recreational fishing on the Great Lakes is done during daytime hours.

3. Most people who fish recreationally on the Great Lakes are interested in the preservation of the lake whitefish because it is a highly prized game fish.

4. The ruffe is one of several nonnative species in the Great Lakes whose existence threatens the survival of lake whitefish populations there.

5. The bait that most people use when fishing for whitefish on the Great Lakes is not attractive to ruffe.

为什么答案是c。我觉得c中所说的，preservation of the whitefish和减少ruffe没有一点关系啊。

那位说说看啊？

看了题目，应该有一种预感：答案应该是跟这种cards的受众有关。这样看来，其他选项都是无关选项，因为cards是发给人，而不是发给鱼（R）。

进一步考察C的reasoning，可以发现其argument在于根据题目信息，R的存在威胁到了W的生存，而如果没有人关心W的生存，自然不会有人来配合关心R的情况——正所谓“爱屋及乌”，C正是提供了这样的正面支持，即人们是为了W而关心R。