BF题的最大困惑,求教

fancylin

BF类型题, 首先这几个概念我一直没搞清楚
argument---到底是论点还是原文?
premise--前提?
conclusion--结论?
main conclusion--总结论?
truth--实事?
circumstance--事件?条件?

以下题为例
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 financial collapse, have been greatly relieved. They reason that, since top executives evidently have faith in the bank’s financial 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 first describes evidence that has been taken as supporting a conclusion; the second gives a reason for questioning that support.
(B) The first 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 first provides evidence in support of the main conclusion of the argument; the second states that conclusion.
(D) The first 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 first 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


我的理解
结论是2个
1是those worrisome rumors must be false 2是Such reasoning might well be overoptimistic
main conclusion
是Such reasoning might well be overoptimistic
cirumstance
是several of a bank’s top executives have been buying shares in their own bank
argument
是"公司是否处于财务危机的边缘"

但是让我疑惑的 "argument seeks to establish"这个到底如何理解,"所要确立的论点"?那这个论点到底是什么?
另外一种理解
如果论点是those worrisome rumors must be false 结论是Such reasoning might well be overoptimistic
那答案中为何又提到"main conclusion"???

在经历了十多道BF题后 这个是我现在最大的困惑,请大侠赐教阿,救我于苦海~~~~

fancylin

  求救阿

fancylin

请大家赐教啊

fancylin

fancylin

没人指点迷津