答案怎么互相矛盾了？

kittyocathy

Archaeologists in Egypt have excavated a 5,000-year-old wooden hull船体；壳 that is the earliest surviving example of a "built" boat--in other words, a boat constructed out of planks木板 fitted together--and that
thus represents a major advance, in terms of boat-building technology, over the dugout logs and reed vessels of more ancient vintage.

(A) together--and that thus represents
(B) together--and this has represented
(C) together, and it represents
(D) together that was representing
(E) together to represent

代词it/this/that不能单独充当主语,必须加上名词才能作主语
(A)
正确, that is… and that thus represents限定性定语从句的并列,同时修饰a 5,000-year-old
wooden hull,  由于该并列结构存在着因果关系,因此添加副词thus修饰represents表明该逻辑关系
(B) this单独充当主语,错误;随意使用现在完成时,改变了原句的意思,并没有证据表明一定要使用现在完成时


既然That不能单独充当主语，怎么A就行啊？郁闷··· ···

gkast

不明白lz的解释从何以来，我也看得晕晕乎。
我只看到 -- a hull THAT is the earliest surviving example, and THAT thus represents
所以是考点是平衡结构，不要想太多。。。