【单选题】
A Anticyclone is a weather system with high barometric pressure at its center, around which air slowly circulates.
B Anticyclone is a large-scale circulation of winds around a central region of low atmospheric pressure, clockwise in the Northern Hemisphere,
C Effects of surface-based anticyclones include clearing skies as well as cooler, drier air.
D Anticyclones are the opposite of depressions and they bring hazardous weather.
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