Answer is C.
A. There will be no new archaeological discoveries in North America that disprove conventional theories.General statement, can't really say that is disproves our conclusion if negated
B. The land bridge used by humans 12,000 years ago was not in existence 13,500 years ago.If the land bridge was in existence - there is no guarantee of human's crossing
C. There have not been discoveries of fossilized human tools from more than 13,000 years ago made in North America. If there were
...
A. There will be no new archaeological discoveries in North America that disprove conventional theories.General statement, can't really say that is disproves our conclusion if negated
B. The land bridge used by humans 12,000 years ago was not in existence 13,500 years ago.If the land bridge was in existence - there is no guarantee of human's crossing
C. There have not been discoveries of fossilized human tools from more than 13,000 years ago made in North America. If there were
...
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