It Tends to Rain More in the Mountains Than in Adjacent

It tends to rain more in the mountains than in adjacent lowlands because

A) as air travels up mountains,it cools.Cool air holds less moisture than warm air does,and the excess moisture is dropped as rain.
B) as air travels up the mountains,it is compressed.The mountains squeeze the water out of the air,and the water falls as rain.
C) mountains are often in the clouds.
D) as air moves down mountains,it expands and does not form clouds,so no rainfall occurs.
E) the rain has farther to travel from clouds to the lowlands,so more evaporates before reaching the ground.