In late winter and spring chunks of rock often fall off of the cliff in the picture. What most likely causes the chunks to separate from the cliff?
A.
Water flowing over the cliff gradually carries away rocks and debris.
B.
Water freezes in the cracks between the rocks and pushes them apart.
C.
Wind blowing on the cliff loosens the chunks of rock.
D.
Air pollution causes a reaction that widens the cracks between the rocks.