The computer company’s present troubles are a result of technological stagnation, marketing missteps, and managerial blunders so that several attempts to revise corporate strategies have failed to correct it.

A.      so that several attempts to revise corporate strategies have failed to correct it.

B.     so that several attempts at revising corporate strategies have failed to correct

C.     in that several attempts at revising corporate strategies have failed to correct them

D.     that several attempts to revise corporate strategies have failed to correct

E.     that several attempts at revising corporate strategies have failed to correct them

答案是D，请问B为何不对？

是因为逻辑含义不能用so that么？

谢谢解答！

so that = in order that.  表目的.

if B were correct in Grammar, B would be as: so that several attempts at revising corporate strategies have failed to correct them.

But B, as well as A and C, 逻辑含义不对.

D: blunders 的定从. the best answer.

so...that expresses result.  thus, B is incorrect.

attemp at (doing) sth  is OK.

attempt at (doing) something
her feeble attempt at humour

其实我是想问一下D的correct 后面them为什么不补出???

大家看呢??