855 Section 11-24

The labor agreement permits staff reductions through attrition with increased pension benefits and a special early-retirement program for speeding it up.

(A) attrition with increased pension benefits and a special early-retirement program for speeding it up

(B) attrition and provides increased pension benefits and a special early-retirement program to speed the attrition process

(C) attrition, which will be speeded up by providing increased pension benefits and a special early-retirement program

(D) attrition, which, by their providing increased pension benefits and a special early-retirement program, will speed the process（B）

(E) attrition, which provides increased pension benefits and a special early-retirement program for speeding the attrition process

答案是B,我选了C.

C为什么错,仅仅是因为主动优于被动吗?

个人看法:

which will be speeded up by providing 不是那么惯用.....

句子改成 provide sth to speed sth up 会比较好.....

还请NN鉴定......