In the historian’s argument, the two portions in boldface play which of the following roles?

A.      The first supplies a context for the historian’s argument; the second acknowledges a consideration that has been used to argue against the position the historian seeks to establish.

B.       The first presents evidence to support the position that the historian seeks to establish; the second acknowledges a consideration that has been used to argue against that position.

C.      The first provides a context for certain evidence that supports the position that the historian seeks to establish; the second is that position.

 D.      The first is a position for which the historian argues; the second is an assumption that serves as the basis of that argument.

E.       The first is an assumption that the historian explicitly makes in arguing for a certain position; the second acknowledges a consideration that calls that assumption into question.

题目都看不懂的，NN大哥大姐们解释下,谢谢，，，，加个问题，我第一次做GWD做了5套了平均错15个大部分错在阅读，上700+还有希望吗？，下5月初就考， 之前做过OG，PREP，新东方出的黄皮一套。还有哪些地方要补补的，请大家多给意见~~~~