Sentence Correction

Hi All,

Can somebody please help me understand why [spoiler]"B"[/spoiler] is best in Q1 and [spoiler]"A"[/spoiler] is best in Q2 ?

In Q1 we are ignoring [spoiler]"them"[/spoiler] as redundant and in Q2, we are keeping [spoiler]"they"[/spoiler] to make it clear. Can somebody please help in clearing this ?

Kindly share your thoughts.

========================================
Q1. Of the people who bought about the reformation, the religious revolution that grew out of objections to the doctrines of the medieval church, Martin Luther is the best known of them.

(A) Martin Luther is the best known of them.
(B) the best known is Martin Luther
(C) the better known of them was Martin Luther
(D) Martin Luther is better known
(E) the best known one was Martin Luther

Q2. In the Champagne region of France, wine growers still harvest grapes as they have done, by carefully hand-picking their crop and storing their precious fruit in specially aged casks for centuries.

(A) wine growers still harvest grapes as they have done
(B) the wine growers still harvests grapes as he has
(C) wine growers still harvest grapes as was done
(D) wine growers still harvest grapes as has been done
(E) wine growers still harvest as they did

Thanks
Mohit