OG12 CR 89 求赐教！！！

rainnight

89. Since it has become known that several of a bank’s top executives have been buying shares in their own
bank, the bank’s depositors, who had been worried by rumors that the bank faced impending fi nancial collapse,
have been greatly relieved. They reason that, since top executives evidently have faith in the bank’s fi nancial
soundness, those worrisome rumors must be false. Such reasoning might well be overoptimistic, however, since
corporate executives have been known to buy shares in their own company in a calculated attempt
to dispel negative rumors about the company’s health.
In the argument given, the two boldfaced portions play which of the following roles?
(A) The fi rst describes evidence that has been taken as supporting a conclusion; the second gives a reason
for questioning that support.
(B) The fi rst describes evidence that has been taken as supporting a conclusion; the second states a contrary
conclusion that is the main conclusion of the argument.
(C) The fi rst provides evidence in support of the main conclusion of the argument; the second states that
conclusion.
(D) The fi rst describes the circumstance that the argument as a whole seeks to explain; the second gives the
explanation that the argument seeks to establish.
(E) The fi rst describes the circumstance that the argument as a whole seeks to explain; the second provides
evidence in support of the explanation that the argument seeks to establish.
我的思路：
由于第一个boldface和第二个boldface前面有SINCE，所以两个都应该是个论证，直接排除BC（CONCLUSION)，然后，如何排除DE呢？？请诸位牛人帮助解答！

tracy214wxy

I cannot see the BF.

sunzehua700

Since it has become known that several of a bank’s top executives have been buying shares in their own
bank, the bank’s depositors, who had been worried by rumors that the bank faced impending fi nancial collapse,
have been greatly relieved. They reason that, since top executives evidently have faith in the bank’s fi nancial
soundness, those worrisome rumors must be false. Such reasoning might well be overoptimistic, however, since
corporate executives have been known to buy shares in their own company in a calculated attempt
to dispel negative rumors about the company’s health.

tracy214wxy

Both BF are premises . . . Only A says so.

triangel8866

NN，问一下，我是这样理解的，为什么不可以呢？  
Since it hasbecome known that several of a bank'stop executives have been buying shares in their own bank, the bank'sdepositors, who had been worriedby rumorsthat the bank faced impendingfinancial collapse, have been greatly relieved.
（backgroud）They reason that, since top executivesevidently have faith in thebank's financial soundness, those worrisome rumorsmust be false. (opposing opinion) Such reasoning mightwell be overoptimistic,(conclusion)
however, since corporateexecutives have been known to buy shares in their own company in a calculatedattempt to dispel negative rumors about the company's health.(the explanation)

so I choose D
(D)  The first describes the circumstance that the argument asa wholeseeks to explain; the secondgives the explanation that the argumentseeks to establish.

longshort

我也考虑了很久
首先两个BF都是premises，conclusion我也基本同意楼上的MM的
但是D答案楼上的 MM理解错了，D答案说的是第一个BF是文章想要解释的现象，第二个BF解释了这个现象。注意看OG上的解释，上面也说了第二个BF本身不是第一个BF的解释，它是support conclusion的。
A答案说的是第一个BF是支持一个结论(lsMM说的Opposing Opinion），第二个BF是对这个reasoning提出疑问。
不知道说清楚没有。

triangel8866

我明白了~我把d答案里的第二个explanation理解成了可以包含supporting。。。Thank you!