The author describes the research of Cyrus Thomas most likely because it:A. discredits the hypothesis that mounds were built by a vanished culture. B.supports the hypothesis that people from the area that is now Mexico influenced Native American mound building. C.establishes when mound building occurred in the eastern Woodlands. D.challenges the diffusion hypothesis put forth by archaeologist

discredits the hypothesis that mounds were built by a vanished culture.

Explanation:

According to the author, Cyrus Thomas refuted the popular idea that mounds were the result of a vanished culture. According to the author, it was believed that the mounds were raised by early Native Americans.

Therefore, the author describes the research of Cyrus Thomas most likely because it discredits the hypothesis that mounds were built by a vanished culture.

#2 the answer is d

#3 the answer is a

#4 the answer is b

new evidence is discovered.

oversights and errors are corrected,

new technology is applied to evidence.