Below are the answers:
4. D - Membership in the League could draw the United States into future wars.
5. B - Native American veterans gained U.S. citizenship after the war ended.
6. B - passing of the Espionage Act
13. A - The United States was hit by a brief recession.
14. B - register with the government
15. A - Soldiers experienced increasingly unsanitary conditions, including rat infestations.
16. C - Journalists had an important influence on Americans’ attitudes about the war.
18. A - The war gave African Americans new economic opportunities working in war industries.