High air pressure systems are usually associated with clear weather. Hence, Option A is correct.
Light winds at the surface and subsidence into the lower troposphere are typically linked with high-pressure systems. In general, adiabatic or compressional heating caused by subsidence will cause an air mass to become dryer. So, clean skies are often associated with high pressure.
Winds in an anticyclone (high pressure) typically blow slowly and counterclockwise (in the northern hemisphere). Additionally, when the air descends, less cloud formation occurs, resulting in mild breezes and calm weather.
The air that is still in the high-pressure region progressively falls lower to fill the space left by the ejected air. Because clouds need rising air to condense, this makes clouds and precipitation uncommon. Areas with high pressure typically have calm, fair weather.
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