Sentence Correction

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

OAD

My Doubt : OA has no Object for the verb CORRECT right? So how come is this correct ?

Why option E is wrong?

Please explain and correct me if I am wrong.

jain2016 wrote:My Doubt : OA has no Object for the verb CORRECT right? So how come is this correct?

What are being corrected are managerial blunders. Maybe simplifying will help.

managerial blunders that attempts have failed to correct

A similar example is walls that Jim has not painted.

Why option E is wrong?

Given what I just said about the OA, you can see that the them at the end of E is redundant.