Which of the following statements is FALSE?
a.
During the Civil War, settlements on the plains were small and far apart.
b.
During the Civil War, Native Americans increased raids and attacks on white settlements.
c.
During the Civil War, the U. S. federal government brought most frontier soldiers off the frontier to fight in the war.
d.
During the Civil War, most mail and travel to the frontier was done by train.

Please select the best answer from the choices provided