GWD 32-2 求助

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 yielding
                    a 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 ate
                

B.     are as vivid in their details of personal life as those gathered
                

C.     is as vivid in their detail about personal life as that gathered
                

D.    is as vivid in its details of personal life as that gathered
                

E.     is so vivid in its details of personal life as is that
                

主词→more than 2,000 letters and documents on wooden tablets

主动词→ are yielding

That在此务必指代→a historical account of the military garrison

依照GMAT惯用指代，that应该是指a historical account

也就是答案D中的”its”＝
                    a historical account’s

Answer :  (D)