The most acceptable theory about how humans came to populate Earth is that they migrated over land from Africa over the last 80,000 years.
<h3>What was the widely accepted human origin? </h3>
It was accepted that Africa is where the modern humans began over thousands of years from which they spread across the world.
It was believed that different environments needed different appearance and behavior and this led to ab enormous variety among human populations of the Earth.
Therefore, the Option C is correct.
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