What Was the Main Purpose of the Civilian Conservation Corps

What was the main purpose of the Civilian Conservation Corps?

A) to train young men to join the army and other branches of the military
B) to provide work relief for young men through the preservation of national resources
C) to give young women an opportunity to earn money for higher education
D) to initiate the labor union movement as a means of bringing wage gains to current workers
E) to establish the first national parks created by the federal government