Why do some scientists now think that some early Americans may have arrived in the Americas via boat? A. Archaeologists may have found the remains of some of these boats. B. Archaeologists have found written descriptions of journeys by boat. C. New evidence has challenged the idea that all early Americans arrived via Beringia. D. Evidence has shown that boats made later by Americans evolved from earlier designs.

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If I were you, I would pick A. Don't quote me on this though.  If the find some of the old evidence, the scientist are more likely to agree that the settlers did indeed travel by boat. That's just my guess. 

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