He extended it up to 600 miles
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It was built on an island in the middle of a lake. The Aztecs built causeways, or raised roads across water or wet ground, so people could access the city.
Answer: d.American Indians
Explanation:
When the Europeans first arrived in the Americas, they found out that the Americas were not uninhabited but had various tribes of a groups of people collectively referred to as American Indians.
As much war and disease befell the American Indians from the Europeans, they lost a lot of their land and their numbers were greatly reduced such that their dominance over the Americas was taken from them and their status in society reduced greatly.