Which of the following statements explains why nativism increased after World War I? a
1.The Great Migration to Northern cities supported fear and prejudicial attitudes.
2.Black and white veterans fighting for the same jobs upon returning from the war
increased racial tensions in Northern cities.
3.The fear many Americans felt toward Germans and Communists during and after World War I expanded to include all immigrants.
4. The Sacco-Vanzetti case proved that European immigrants could not be trusted.

3.The fear many Americans felt toward Germans and Communists during and after World War I expanded to include all immigrants.

Explanation:

Nativism refers to the tendency to put the interests and rights of natives over that of immigrants.

After the first World War in which the U.S., Britain and other allies fought against the Germans, Americans expressed nativism towards German immigrants as they were their opponents in the war.

They also feared what Communism might bring if it was allowed into the States which translated to treating communist suspected immigrants with apprehension.

i beleive that d is the right answer