Humans reached North America approximately _______ years ago, during a rare opportunity to cross the land bridge across the area commonly known as the Bering Sea.

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The generally accepted theory is that humans reached North America around 15,000 years ago, during the last ice age when sea levels were lower and a land bridge known as Beringia connected Asia and North America. There is no evidence to support options A, B, D, or E.

Humans Reached North America Approximately _______ Years Ago, During a Rare