The topographic maps below show the same location before and after a natural event.

What most likely caused the changes around the river?
A.
After a storm, fast-moving water in the river removed sediment.
B.
A strong wind moved sediment from the river to the hill.
C.
During a drought, the river slowed down and deposited sediment.
D.
A landslide brought sediment from the hill to the edge of the river.