Which best describes a common relationship between air temperature and regions of high pressure and of low pressure?
 A.
 Cool air rises, making the pressure above lower; warm air sinks, making the pressure above higher.
 B.
 Cool air near the surface forms high pressure areas; warm air forms low pressure areas.
 C.
 High pressure areas warm the air around them; low pressure areas cool the air around them.
 D.
 Dry air makes high pressure areas cooler; humid air makes low pressure areas warmer.