How Does Damming or Altering the Path of a River

Multiple Choice

How does damming or altering the path of a river destroy wetlands?

A) Fish can no longer migrate up and down the river.
B) Wetlands can no longer obtain nutrients from annual floods.
C) Wetlands can no longer obtain oxygen from the flowing water of the river.
D) Birds can no longer get to the wetlands.
E) Increased nutrients flow into the wetlands, causing eutrophication.