How does erosion affect streams?

A.
Erosion causes stream beds to become permanently steep.
B.
The water in streams warms up and rapidly evaporates due to continuous erosion.
C.
Erosion empties streams by causing water to seep underground.
D.
Streams meander, or curve, more due to erosion and deposition.
E.
As parts of a stream are eroded, it swells with the excess water.