How did the notions of education and immigration intersect in the 19th-century United States? A. It was thought that separate educational systems for people of different backgrounds could help preserve cultural beliefs.

B. The United States lost many highly educated people who immigrated to other countries.

C. The United States encouraged large waves of educated people from other countries to immigrate to the United States.

D. It was thought that a common education could help integrate people with widely different backgrounds.​