GWD-3-34

Just like the background in art history needed by an archaeologist in order to evaluate finds of ancient art, the nautical archaeologist needs specialized knowledge of the history and theory of ship design in order to understand shipwrecks.

A. Just like the background in art history needed by an archaeologist in order to evaluate finds of ancient art, the

B. Just as an archaeologist who needs a background in art history to evaluate finds of ancient art, a     

C.
                    Just as an archaeologist needs a background in art history to evaluate finds of ancient art, so a

D. Like the archaeologist who evaluates finds of ancient art and requires a background in art history, so the   

E. As evaluating finds of ancient art requires an archaeologist who has a background in art history, so the

答案C中, just as......, so .......这种用法正确吗?  我感觉应该是just as A do...., B do...., 不加so的呀.

哪位大牛说说?

同问？

我急的新东方老师说过，just as 不妨在句首的，是因为just as A do, So B do ,是固定搭配？

D为什么错？