Well it was the Cold War, with nukes of course, so not the good almost went to WWIII.
An autocracy is a system ruled by one person. Nazi German is an example of autocracy. Hitler directed all the activities inside Germany at that time.
Out of the choices given, the body of water that the Eastern Roman Empire bordered was the Black Sea. The capital of of the empire was Constantinople and it was the closest to the Black Sea. The correct answer is A.