People have been quick to either condemn or praise the use

i can see no other answer than A and B, thogh i have problems with it. i thought it was A, but chose B.

(A) quick to either condemn or praise the use of nuclear bomb by the US in the second world war, some saying that it was one of the darkest events of the 20th century, while some others (others is not needed)

(B) quick to either condemn or praise the use of nuclear bomb by the US in the second world war, some saying that it was one of the darkest events of the 20th century, but (seems right. people condemn or praise, and some just realistic-it was a dark event but necessary)

(C) quick to either condemn or praise the use of nuclear bomb by the US in the second world war; they (same as d . they should be divided to2 groups) say (should be saying) that it was one of the darkest events of the 20th century,

(D) Quick to either condemn or praise the use of nuclear bomb by the US in the second world war; while they say (it's not parallel to admitting) that it was one of the darkest events of the 20th century, they are also (+ does not make sense. some praised and some condemned. so they can not relate to those who condemned)

(E) either quick to condemn or praise (quick to either) the use of nuclear bomb by the US in the second world war; while they are saying that it was one of the darkest events of the 20th century, they are also (same as d- does not make sense)