再请教大全－补充－72，108？

Although Ms. Bakara had previously emphasized that she could not speak for other Black people, she ventured to do so on this one occasion because she firmly believed that many minority people, likely most, would agree with her.

(A) do so on this one occasion because she firmly believed that many minority people, likely most, would agree

(B) speak on this one occasion since she firmly believed that many minority people, likely most, would have agreed

(C) so speak on this one occasion due to her firmly believing that many minority people, even most, would likely agree

(D) do so on this one occasion because she firmly believed that many minority people, if not most, would agree（D）

(E) do so on this one occasion since she firmly believed many minority people, and even most, would likely agree

看过了以前发过的贴子，但还是不明白为什么A不对，哪位NN能帮忙看看？谢谢！

Textbooks for the used book sale should be in good condition and should have no writing in them or be underlined.

(A) and should have no writing in them or be underlined

(B) and should not have writing in them or not be underlined

(C) and contain no writing or underlining

(D) without containing writing nor be underlined（C）

(E) without having any writing or no underlining in them

A和B为什么不对？