GMAT Sentence Correction (SC) | The restructuring agency explored several alternatives, i

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The restructuring agencyexplored several alternatives, including complete and partial liquidation of assets, but has not found any feasible solution to the problems faced by the company.
A) explored several alternatives, including complete and partial liquidation of assets, but has not found
B) had explored several alternatives, which includes complete and partial liquidation of assets, but has not