[求助]请教大家一道题。谢谢

大全885-9.     In
the United States, trade unions encountered far more intense opposition against
their struggle for social legitimacy than the organized labor movements of
most other democratic nations.E

(A) against their
struggle for social legitimacy than

(B) in their
struggle for social legitimacy than did

(C) against their
struggle for social legitimacy as

(D) in their
struggle for social legitimacy as did（B）

(E) when they
struggled for social legitimacy than has

正解是B我选的E，E是错在has和前面时态的对应上？还是错在 opposition的固定搭配上，请指教

1.opposition 和against在一个句子里is redundant.

2.比较结构前后要对称．后面did要和前面的encountered对称．

所以是Ｂ