GMAT Sentence Correction (SC) | Re: During the quality check last month a group of experts declared much o

A. During the quality check last month a group of experts declared much of the fire-fighting equipment to be dysfunctional that was assembled ---dysfunctional that was assembled doesn’t make much sense.

B. During the quality check, much of the fire-fighting equipment that was declared as dysfunctional by a group of experts had been assembled last month -placement of last month is wrong. It should go close to the check

C. Much of the fire-fighting equipment that was declared