How did U.S. involvement in World War II help bring the Depression to an end?

a, The war's threat to the nation caused people to forget about their economic trouble.s

b, Americans became more concerned about restoring democracy to Europe than in restoring jobs at home.

c, Factories began operating at full production again to make the weapons, supplies, and other goods needed to fight the war.

d, The war gave unemployed Americans jobs in the military.