OG

das.ashmita wrote:In 1791 Robert Carter III, one of the wealthiest plantation owners in Virginia, stunned his family, friends, and neighbors by filing a deed of emancipation, setting free the more than 500 slaves who were legally considered his property.
(A) setting free the more than 500 slaves who were legally considered
(B) setting free more than the 500 slaves legally considered as
(C) and set free more than 500 slaves, who were legally considered as
(D) and set free more than the 500 slaves who were legally considered
(E) and he set free the more than 500 slaves who were legally considered as

OA A

There can be primarily two approaches to solve this question.

1) If "and" is used after "filing a deed of emancipation" then it forms a different clause and alters the meaning of the sentence. So we can eliminate options (C),(D) and (E).
From (A) & (B), although (A) sounds a bit wierd when we write "setting free the more than 500..." it is gramatically correct. In (B), the meaning of the sentence is altered when "more than the 500..." is used AND "as" at the end gives an incorrect form of idiom when joined with the rest of the sentence. So, the answer is (A)

2) Another approach is by considering the terminating idiom "legally considered his property" which is correct. Wherever "as" is used, then sentence reads as "legally considered as his property" is incorrect. So this eliminates options (B),(C) and (E).
From the remaining (A) and (D), "and" at the beginning and "more than the 500..." are the errors.
So, remaining option is (A).

Hence, OA is (A)