It is believed that many early humans settled in the americas after migrating over beringia, a land bridge over

The Bering Strait

Explanation:

The Bering Strait is a strait that separates Russia and Alaska, close to the Arctic circle. It is believed that this strait was the area through which humans migrated from Asia to North America. This was done by using a land bridge known as Beringia. Although this is not proven, it remains the most accepted theory of how humans entered the American continent.

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the answer would be c