【求助】GWD3-Q1 请各位帮我看看这个题

璘儿小猪

GWD3-Q1:
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
E.    that they have presumed are of the same species, and

andreasyang

选B咯

璘儿小猪

选B咯

-- by 会员 andreasyang (2010/8/25 17:44:29)

能说说为什么吗