Answer:
1. 50 million people were already living in the Americas.
2. Some 10 million lived in the area that would become the United States.
3. Many thousands of years before Christopher Columbus’ ships landed in the Bahamas, a different group of people discovered America.
4. The nomadic ancestors of modern Native Americans who hiked over a “land bridge” from Asia to what is now Alaska more than 12,000 years ago.
Explanation:
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