[問題]Prep-T1-Q90

[anthonylee]

90. (29431-!-item-!-188;#058&003914)
Archaeologists in Egypt have excavated a 5,000-year-old wooden hull that is the earliest surviving
example of a "built" boat--in other words, a boat constructed out of planks 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


正確選項是(A), a wooden hull that is ... and that thus represents ... 平衡
請問選項(C)不好在哪裡, and 前的逗號應該省略 or "it" 應該省略?
還是真的是句意上的差別?
謝謝!

[dibert8]

能準確指代 hull 的只有用關代 that, 因此 it 指代不清 (= boat? hull?)