GMAT Sentence Correction (SC) | Re: Written in ink or engraved by stylus, more than 2,000 letter

Written in ink or engraved by stylus, more than 2,000 letters and documents on wooden tablets excavated at the site of the old roman fort at vindolanda in northern England are yieldinga historical account of the military garrison in the first and second centuries that are so vivid in their details about personal life as they are from Pompeii

A.are so vivid in their details about personal life as they are
B.are as vivid in their details of personal life as those gathered
C. is as vivid in
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