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Katena32 [7]
3 years ago
12

Charcoal from a hearth site in Colorado, 2,000 miles south of Alaska, is known to be 11,200 years old. Researchers reasoned that

, since glaciers prevented human migration south from the Alaska-Siberia land bridge between 18,000 and 11,000 years ago, humans must have come to the Americas more than 18,000 years ago.
Which of the following pieces of new evidence would cast doubt on the conclusion drawn above?

(A) Using new radiocarbon dating techniques, it was determined that the charcoal from the Colorado site was at least 11,400 years old.

(B) Another campsite was found in New Mexico with remains dated at 16,000 years old.

(C) A computer simulation of glacial activity showed that it would already have been impossible for humans to travel south overland from Alaska 18,500 years ago.

(D) Using new radiocarbon dating techniques, it was proved that an ice-free corridor allowed passage south from the Alaska-Siberia land bridge at least 11,400 years ago.

(E) Studies of various other hunting-gathering populations showed convincingly that, once the glaciers allowed passage, humans could have migrated from Alaska to Colorado in about 20 years.
History
1 answer:
mina [271]3 years ago
5 0

Answer:

(B) Another campsite was found in New Mexico with remains dated at 16,000 years old.

Explanation:

The hypothesis is telling us that humans could not have crossed to Alaska from Siberia in the years between 11,000 - 18,000, however, if two archeological sites are found and dated 11,200 years old and 16,000 years old, the new evidence contradicts the hypothesis and the hypothesis should be discarded.

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