B would be the answer because they were mapping the Mississippi river.
According to the historical findings, the oldest human remains found in the Americas has been identified in the region of Mexico and appears to be related to the Japanese.
- This is because the oldest human remains were found in Santa Rosa Island in California which is the region of Mexico.
- This body was later named the Arlington Springs Man who lived around 13 thousand years ago.
- These findings were made through carbon dating.
- It was believed that the man came from the Siberia part which is closer to the modern-day Japanese territory.
Hence, in this case, it is concluded that the oldest human remains found in the Americas have been identified in the region of Mexico and appear to be related to the Japanese.
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The answer is A, the Mississippi river
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