Mountain and Valley Breezes

Mountain and valley breezes

A) are caused by valley floors heating more quickly than valley slopes during the day and cooling more rapidly at night.
B) are characterized by warmer air descending mountain slopes during the day and valley air ascending the mountain slopes at night.
C) are secondary wind systems.
D) involve warm air rising upslope during the day,creating an area of low pressure; whereas,at night cool air forms and descends downslope with a lower pressure area on the valley floor.