Question

Which sentence uses commas correctly?

A.
Trinity College is in Hartford, Connecticut, on the edge of the city.

B.
In Athens Greece, you can see architectural ruins over two thousand years old.

C.
Brooklyn New York, is an interesting place to live.

D.
Contact Mr. Filson, in Reston, Virginia for the latest reports.

Answer 1

Your answer would be D here because the rest have state's and there cities and do not use commas between them and A is incorrect because it uses a comma after Connecticut when it shouldn't be there so it's an extra comma 

Answer 2

A. Trinity College is in Hartford, Connecticut, on the edge of the city.