那个ice age生物的逻辑

windmaple

今天在老prep里面找到了
Paleontologist: About 2.8 million years ago, many species that lived near the ocean floor suffered
substantial population declines. These declines coincided with the onset of an ice age. The
notion that cold killed those bottom-dwelling creatures outright is misguided, however;
temperatures near the ocean floor would have changed very little. [BF]Nevertheless, the cold
probably did cause the population declines, though indirectly[BF]. Many bottom-dwellers
depended for food on plankton, small organisms that lived close to the surface and sank to the
bottom when they died. [BF]Most probably, the plankton suffered a severe population
decline as a result of sharply lower temperatures at the surface, depriving many
bottom-dwellers of food[BF].
In the paleontologist's reasoning, the two portions in boldface play which of the following roles?
(A) The first introduces the hypothesis proposed by the paleontologist; the second is a judgment
offered in spelling out that hypothesis.
(B) The first introduces the hypothesis proposed by the paleontologist; the second is a position
that the paleontologist opposes.
(C) The first is an explanation challenged by the paleontologist; the second is an explanation
proposed by the paleontologist.
(D) The first is a judgment advanced in support of a conclusion reached by the paleontologist;
the second is that conclusion.
(E) The first is a generalization put forward by the paleontologist; the second presents certain
exceptional cases in which that generalization does not hold.

nowel

有正確解答嗎LZ? thanks a lot

perfect3Juliet

求答案~BF题每做每错……

花子落落

http://www.manhattangmat.com/forums/cr-paleontologist-about-2-8-million-years-ago-t5516.html
选A么~

sunshinessl

选A，晕了。

Poodle1223

我也觉得是A