求助pre118

118-It was only after Katharine Graham became publisher of The Washington Post in 1963 that it moved
into the first rank of American newspapers, and it was under her command that the paper won high
praise for its unrelenting reporting of the Watergate scandal.
 
(A) It was only after Katharine Graham became publisher of The Washington Post in 1963 that it
moved into the first rank of American newspapers, and it was under her command that the paper
won high praise
(B) It was only after Katharine Graham's becoming publisher of The Washington Post in 1963 that it
moved into the first rank of American newspapers, and under her command it had won high praise
(C) Katharine Graham became publisher of The Washington Post in 1963, and only after that did it
move into the first rank of American newspapers, having won high praise under her command
(D) Moving into the first rank of American newspapers only after Katharine Graham became its
publisher in 1963, The Washington Post, winning high praise under her command
(E) Moving into the first rank of American newspapers only after Katharine Graham's becoming its
publisher in 1963, The Washington Post won high praise under her command 
 

the answer is A. BUT,are these three"it " the same?

it都指代the paper

十分感谢！！！这个知识点我以前从来没有接触过，还以为it都是指代呢！很强哦！