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【单选题】
According to Paragraph 4, the fact that the lnuit cut meat by holding it between their teeth is significant because ______.A.
the relationship between handedness and scratches on fossil human teeth can be verified
B.
it emphasizes the differences between contemporary humans and their ancestors
C.
the scratch patterns produced by stone knives vary significantly from patterns to patterns
D.
it demonstrates that ancient humans were not skilled at using tools
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