请教一道题目的分类

哎唷不小心

In the late 1980s, the population of sea otters in the North Pacific began to decline. There are two plausible explanations for the decline: predation, possibly by killer whales, or disease. Of these two, disease is the more likely, since a concurrent sharp decline in populations of seals and sea lions is believed to have been caused by disease, and diseases that infect these creatures are likely to be able to infect sea otters also.
Which of the following, if true, most seriously weakens the reasoning?
A. Killer whales in the North Pacific usually prey on seals and sea lions but will, when this food source is scarce, seek out other prey.
B. There is no indication that the sea otter population at any North Pacific location declined in the 1980s because of substantial numbers of sea otters migrating to other locations.
C. Along the Pacific coast of North America in the 1980s, sea otters were absent from many locations where they
had been relatively common in former times.
D. Following the decline in the population of the sea otters, there was an increase in the population of sea urchins,
which are sea otters' main food source.
E. The North Pacific populations of seals and sea lions cover a wider geographic area than does the population of
sea otters.

这道题估计大家都看过，我在进行分类的时候总觉得属于类比题型：
（我不知道我这样类比对不对）
相似点，seals和otter都生活在海中
disease会影响seal ——推出——disease同样会影响otter

但是根据类比题的两个CQ——1.相似性 2.是否存在范例，都不能得出答案A。
如果我用相似性来论证，E选项不是更符合吗？表明了seals和otters生存环境的不同，从而不同以一个地方的disease来推断另外一个？求大神赐教，谢谢！！

maobaobao800

这道题答案是D

哎唷不小心

maobaobao800 发表于 2013-9-14 19:40
这道题答案是D

答案不是A吗？

lxskyfly

答案是A没错~
个人觉得这道题是个果因推理，不是类比推理。
虽然文章提出了两个explanation，但是文章提出的推理链只是针对disease这一个explanation的。只要weaken了其中一个explanation，就自然strengthen了另一个。
文章先提出来一个现象，然后探究发生的原因--> 果因推理
A: CQ:说明结果问题。提出了另一个新的原因来解释这个现象~

哎唷不小心

lxskyfly 发表于 2013-9-15 10:50
答案是A没错~
个人觉得这道题是个果因推理，不是类比推理。
虽然文章提出了两个explanation，但是文章提出 ...

嗯，这么一说好像确实是，谢谢！

maobaobao800

哎唷不小心 发表于 2013-9-15 10:28
答案不是A吗？

谢谢楼主，这道题我居然一直默默的拿错答案分析

哎唷不小心

maobaobao800 发表于 2013-9-15 11:52
谢谢楼主，这道题我居然一直默默的拿错答案分析

不谢，那估计得越分析越头疼了