Indian burial mounds were built at various times and in various parts of the Americas throughout history. Therefore, for this question the answer would be A.) they were built at various times throughout the Americas.
The correct answer is A: 'They were built at various times throughout the Americas.' Indian burial mounds reflect the diverse practices of different indigenous cultures, spanning multiple regions and time periods. In contrast, option B is not accurate as mounds were not limited to just one area.
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