SAT grammar

In 1903, physicist Marie Curie was the first woman to win the Nobel Prize, moreover,in 1911,she became the first person to win it a second time.

A. physicist Marie Curie was the first woman to win the Nobel Prize, moreover,

C. physicist Marie Curie became the first woman to win the Nobel Prize;

E.physicist Marie Curie became the first winner of the Nobel Prize among women, moreover,

Why C is correct?I think it needs a word after the ";" to emphesize she became the first person to win it a second time. And why A and E are wrong?

Those who defend sequoia trees from loggers justified doing so on the grounds that such

A B C D

trees are irreplaceable. No error

E

What's wrong with C?

Thanks for answer these questions!