语法section11 新东方老书

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 bene-

fits 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

(E) attrition, which provides increased pension

benefits and a special early-retirement

program for speeding the attrition process

Key是B.为什么不能选C。而且B选项没有冗长的错误吗？

B: labor agreement permits...and provides... 对称, 逻辑正确

C: will be speeded by 被动语态, 从而导致providing的主语不明.