Answer:
A
Explanation:
I'm pretty sure its correct it might be D.
Mongol conquerors founded the Yuan Dynasty.
Ancient Roman's developed networks of highways, waterways, and other transportation to help get a fresh water supply to the city for take such as bathing, washing cloths and cooking ware. While Highways and transportation was used for things such as; making trade routes and transportation via carriage much easier and making it easier for armies to march.