Which tendency of new immigrants during the early 20th century did supporters of the Americanization movement oppose?
A. The tendency of new immigrants to attend schools to learn
American culture
B. The tendency of new immigrants to use their knowledge of
American culture to start new businesses
C. The tendency of new immigrants to work in low-paying factory
jobs and live in tenements
O D. The tendency of new immigrants to stay in ethnic neighborhoods
and retain their cultural identity

The correct answer is D. Supporters of the Americanization movement opposed the tendency of new immigrants to stay in ethnic neighborhoods  and retain their cultural identity.

Explanation:

During the first part of the 20th century, large waves of immigrants came to the United States from different regions of the planet, mainly Irish, Italians, Germans, Norwegians, Poles, Asians, and Mexicans. These immigrants, in their great majority, did not manage the English language and therefore they could not immediately insert themselves into society (except the Irish). This led to the creation of ethnic neighborhoods in the different cities of the country, such as Little Italy in New York, where these immigrants settled and recreated their cultural and social spaces, maintaining their language and customs.

This was frowned upon by nativists, who believed that foreigners should make the effort necessary to rapidly assimilate into the prevailing Anglo-Saxon culture in the United States, even believing that the customs, traditions, and values of those foreigners endangered their own national idiosyncrasy .

d. migration

they thoght they were going to nuke each other