prep p1 29

moumouliu

prep1 - 29
To reduce the danger to life and property posed by major earthquakes, scientists have been investigating several techniques for giving advance warning of dangerous earthquakes.  Since catfish swim erratically before earthquakes, some investigators have proposed monitoring catfish to predict dangerous earthquakes.

Which of the following, if true, most seriously undermines the usefulness of the proposal?

(A) In Japan, which is subject to frequent earthquakes, the behavior of catfish has long been associated with earthquakes.
(B) Mechanical methods for detecting earthquakes have not proved effective.
(C) Tremors lead to the release of hydrogen sulfide gas into water, thereby causing various fish and shellfish to behave erratically.
(D) Careful construction can reduce the dangers posed by earthquakes.
(E) Even very slight, fleeting tremors cause catfish to swim erratically.

我选的c 谁能给我解释解释我什么地方错了呢？~~我知道e对在什么地方~~

fuknokia

C是解释的鱼儿剧烈运动的内在因素。而地震则是外因。也就是说我们不知道是否有其他外因导致结果发生。
所以C应该是无关项