Answer:Aztecs
By the early 1500s the Aztecs had conquered most of Mesoamerica and had imposed their rule on an estimated 11–12 million people.
Explanation:
Mainly through better advancement in technology and our understanding of engineering. What with us going from living in caves to making wooden homes to now living in steel and concrete.
D. 18th century I believe.
Because the economy of the united states depended on trade with great Britain
