Seattle, Washington is located at 47.5°N latitude and Boston, Massachusetts is located at 42.22°N latitude, so Seattle is farther north than Boston. Both cities border oceans, the Pacific Ocean in the case of Seattle and the Atlantic Ocean in the case of Boston. Both cities are in close proximity to a segment of the global thermohaline circulation system, the Japanese Current for Seattle and the Gulf Stream for Boston. Seattle, though, rarely experiences winter snowfall, whereas Boston often does. Why?
A. Winter storms approach Boston from the east driven by the warm thermohaline Gulf Stream.
B. Winter storms approach Boston from the west that draw cold air southward from the Arctic.
C. Winter storms approach Seattle from the west driven by the warm thermohaline Japanese Current.
D. "A" and "B" combined provide the answer.
Answer: D
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