Answer: 3.The fear many Americans felt toward Germans and Communists during and after World War I expanded to include all immigrants.
Step-by-step 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.