Which statement about high-pressure rotation in the Northern Hemisphere is correct?

• A. Counterclockwise.
• B. Radially outward with no rotation.
• C. Clockwise.
• D. Upward only.

Answer: (C)

In the Northern Hemisphere, high-pressure centers drive anticyclonic (clockwise) circulation. Air near the center sinks due to the subsiding air associated with high pressure, and as this air spreads outward at the surface, the Coriolis effect deflects it to the right. That rightward deflection causes the winds to rotate clockwise around the center.

So the rotation is clockwise because of the combination of sinking air and the rightward deflection from the Earth's rotation. The other descriptions don’t fit: counterclockwise would describe a low pressure or a high in the Southern Hemisphere; purely radial outward flow ignores the Coriolis deflection; and upward motion is not a feature of a high-pressure system, which is characterized by sinking air.