单项选择题

On the pole side of the trade wind belt，there is an area of high pressure with weak pressure gradients and light，variable winds. This area is called the（）.

A.prevailing westerlies
B.geostrophic winds
C.doldrums
D.horse latitudes

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A.starboard bow，note the course，and head in that direction
B.starboard quarter，note the course，and head in that direction
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海洋学基本知识

On the pole side of the trade wind belt，there is an area of high pressure with weak pressure gradients and light，variable winds. This area is called the（）.