You put the wrong question with the wrong answer choices. The question with those answer choices was: PART B: Which of the following quotes best supports the answer to Part A?
The answer choices for that question was: A. Despite being two different empires, they had friendly relations and a good deal in common; thus they are often conflated as being a part of the same empire. B.They were part of the same Roman empire, but the Eastern half (i.e. the Byzantine Empire) separated from the Western half and outlasted it. C.They were fundamentally different empires, despite always being formally ruled by the same emperor and the same church. D. They were part of the same Roman empire, but the Eastern half (i.e. the Byzantine Empire) differed mainly in its economy and tax system, for which it is now infamous.