D+b i think... I am not sure, but I am pretty sure that that is what it is, because none of the other answers make sense.
Answer:
The Mongol Empire was noted for its sheer military power, a rapid communication system based on relay stations, paper currency, diplomatic immunity and safe travel under Pax Mongolica. These features facilitated the growth, strength and flexibility of the Empire in responding to ever-changing circumstances.
Explanation:
Government became necessary in order to rule the people
Different geographic features may have given them different ideas about their gods and how they work.
