Answer:
The leeward side is often warmer than the windward side because as air moves down the leeward side, it expands and warms.
Explanation:
A is not correct because the air on the leeward side doesn't compress and cool in most cases.
B is correct because the air that moves on the leeward side lacks humidity, so it expands quickly and warms up.
C is not correct because when the air compresses it cools down, it doesn't warm up.
D is not correct because the air warms up when it expands, not when it compresses.