A. ancient cultures were in most likelihood unable to develop such a sophisticated form of maritime transport that they were able to cross the Atlantic
B. it supports the Clovis school of thought, and posits the existence of a capacity not commonly associated with ancient people
C. the Clovis people had crossed from Siberia navigating across a difficult ice corridor, whereas the pre-Clovis people had sailed, with far less difficulty, across the Atlantic ocean
D. it suggests that the pre-Clovis people had a way to circumvent the ice-corridor, yet were unlikely to have traveled as far south as modern day Chile
E. it runs counter to one of the chief tenets of the“Clovis first”school of thought
我的答案: 无