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Unlike historical evidence of weather patterns in other regions of the world, which scientists find abundantly represented in tree rings, ancient glacial ice, or layers of sediment from seasonal plankton, the North Pole’s clues about its past climates are almost nonexistent.
A. the North Pole’s clues about its past climates are almost nonexistent.
B. the North Pole does not offer many clues as to its past climates
C. clues to the past climates of the North Pole are almost nonexistent
D. there are few clues about past climates for the North Pole
E. the past climates of the North Pole do not offer many clues
C
A. the North Pole’s clues about its past climates are almost nonexistent.
B. the North Pole does not offer many clues as to its past climates
C. clues to the past climates of the North Pole are almost nonexistent
D. there are few clues about past climates for the North Pole
E. the past climates of the North Pole do not offer many clues
C
