GMAT Sentence Correction (SC) | The computer companys present troubles are a result of

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

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

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 correctthem

D.that several attempts to
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