The answer is B, Here's some more information on the topic:
Time has seen the rise and fall of a number of great empires - the Babylonian, the Assyrian, the Egyptian, and lastly, the Persian. Regardless of the size or skill of their army or the capabilities of their leaders, all of these empires fell into ruin. History has demonstrated that one of the many reasons for this ultimate decline was the empire’s vast size - they simply grew too large to manage, falling susceptible to external, as well as internal, forces. One of the greatest of these empires was, of course, the Roman Empire. Over the centuries it grew from a small Italian city to control land throughout Europe across the Balkans to the Middle East and into North Africa.
