疑问，prep-1 Q226!!!!!!!!!.关于so that和so...

qqqlyx

The four-million-year-old fossilized skeleton known as Lucy is so small compared with many other skeletons presumed to be of the same species, and so some paleontologists have argued that Lucy represents a different lineage.

A.presumed to be of the same species, and so

B.presumed to be of the same species that

C.presumed that they are of the same species, and so

D.that they have presumed to be of the same species, so that(B)

E.that they have presumed are of the same species, and

笔记中的解释是，so that结构必须完整，那我为什么不能把so small理解为形容词？（类似于so bad）
然后选A，
感谢大N！！！

jaze

不选A的理由很多啊，
skeleton is so small, and so ...
这个结构本身看起来，就不好看，容易引起歧义

and so 如何理解？
两个连词？ 并列？
如果so是副词， 那后面跟个名词作甚？