Islamic armies conquered major cities to help spread islam on three continents.
I believe the answer is: 3. The canals and temples in the city show advanced engineering skills.
The site shows that the Aztec civilization had developed a very advanced irrigation system that utilize different elevation to obtain water for their agricultural field. Their system was later adopted by the spanish empire who invaded their territory.
Confucius
Key texts from Confucius (551-471 BCE) were core material for the civil service examinations in imperial China, beginning in the Sui dynasty (581-618 CE) and reaching the height of development in the Qing dynasty (1644-1912 CE). Not only was the focus on Confucius, but on recognized authoritative commentaries on Confucius.
B. II is the territory from the Louisiana purchase
