a03b
Mayan civilization flourished at the same time as Greek civilization.
Mayan civilization flourished at the same time as Greek civilization did.
(I just made up the names.)
this point of grammar is important. I know what you think because I used to think over this point many time.
I will give you a sugestion relevant to this point.
the pattern with "the same as" is comparision pattern, which contain elipsis. you can infer the correct way of expression using "the same as".
the correct pattern is
clause+the same as subject+do/did
this means the OA here is not perfect. I agree with you on this point
in og books, you will see that gmat play us on comparison with ellipsis many times. your thinking of this point will help you a lot. do not hurry to go to another question. think over this problem a gain, many times, and you will see the mastery of sc.