Which Statement About the Impact of Dams on Cottonwood Forests

Which statement about the impact of dams on cottonwood forests is false?

A) Damming reduces growth of established cottonwoods downstream.
B) Damming increases mortality of established cottonwoods downstream.
C) By reducing flooding downstream, damming improves cottonwood seed germination.
D) The timing of water release from a dam can greatly affect cottonwood seed germination.
E) Careful management of flow through dams can greatly reduce harmful impacts on cottonwoods downstream.