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.
A. Ziggurats were built on high platforms to keep them safe from floods. :)
C.<span> Much of life in a Sumerian city centered on the ziggurat. </span>
D South Korea felices entirely