逻辑机经宇航员这道争议题，应该选谁？

misslila

Astronomer: Observations of the Shoemaker-Levi comet on its collision course withJupiter showed that the comet broke into fragments before entering Jupiter'satmosphere in 1994, but they did not show how big those fragments were.】 In hopes of gaining some indication of the fragments' size, astronomersstudied spectrographic analyses of Jupiter's outer atmosphere.  These analyses revealed unprecedented tracesof sulfur after the fragments' entry. The fragments themselves almost certainlycontained no sulfur, but many astronomers believe that the cloud layer below Jupiter's outer atmospheredoes contain sulfur.  Since sulfurwould have seeped into the outer atmosphere if comet fragments had penetratedthis cloud layer,it is likely that someof the fragments were at least large enough to have passed through Jupiter'souter atmosphere without being burned up.
In the astronomer's argument, the twoportions in boldface play which of the following roles?
A. The first is a claim that the astronomerseeks to show is true; the second acknowledges a consideration that weighsagainst the truth of that claim.
B. The first is a claim that the astronomerseeks to show is true; the second provides evidence in support of the truth ofthat claim.
C. The first and the second are each considerationsadvanced in support of the conclusion of the argument.
D. The first provides evidence in support ofthe conclusion of the argument; the second is that conclusion.
E. The first is a circumstance for which theastronomer seeks to provide an explanation; the second acknowledges aconsideration that weighs against the explanation provided by the astronomer


机经上给的答案D。假设真正的粗体部分就是这样，我认为选c，原文粉色的部分是结论。
请教各位的看法

misslila

我有看呀～～跟GWD划线部分不一样，
发这个贴就是想问一下如果是这样划线的话，应该是各起到什么作用的。

gre呀gre

JJ上写的考古是GWD原题，考的是变体
也就是说，原文是一样的，但是BF的部分不一样，底下的链接有原题的讨论贴

misslila

也有说d，到底哪个比较好呢？
都是正向的，不太好区分

xiaxia0703

我看的版本，怎么机经上答案就是C

misslila

upup

misslila

那么前半句but many astronomers believe that the cloud layer below Jupiter's outer atmospheredoes contain sulfur.

应该怎么理解呢？这个不是结论么？

gelukkig

It's all about the fragments size, so D is correct