Scholars generally believe that human beings first came to populate the American continents by immigrating across

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The most widely accepted theory is that humans migrated from Siberia into Alaska during the last Ice Age when a land bridge, called Beringia, existed between the two regions. This theory is supported by archaeological evidence and genetic studies of Native American populations. Options A and B involve crossing the Pacific Ocean, which is not supported by any evidence. Option D is also not supported, as there is no archaeological or genetic evidence of a European or African presence in the Caribbean prior to Columbus's arrival in 1492.

Scholars Generally Believe That Human Beings First Came to Populate