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By 12,000 years ago:A. the Clovis point had replaced all other stone tool types in North and South America.B. a single post-Clovis type was found across all of North America.C. the Clovis point had been replaced by a variety of regional types.D. post-Clovis and Clovis points are found alongside one another at the same sites and deposits.E. None of the answer options is correct.

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