Why does the author mention Cyrus Thomas's research?

• A. To support the view that mounds have diverse origins
• B. To highlight the similarities with other cultures
• C. To argue against the theory of a vanished culture
• D. To provide context about mound construction

Answer: (C)

The mention of Cyrus Thomas's research serves to dispute the theory suggesting the existence of a vanished culture responsible for the construction of mounds. Thomas conducted significant studies in the late 19th century that concluded the mounds were likely built by pre-Columbian Native American peoples, countering ideas that these structures were the work of a lost civilization. By referencing his findings, the author strengthens the argument that the origins of the mounds can be traced back to known cultural groups rather than an unidentified and vanished culture. This context is crucial in understanding the historical narrative surrounding the mounds and clarifying misconceptions about their creators.