Answer:
The Johnson-Reed Immigration Act
Step-by-step explanation:
The Johnson-Reed Immigration Act was an act created by United States government to limit the amount of immigrant from Eastern Hemisphere of the world. Because of this act, people from countries from Asia and Eastern Europe experienced difficulties to enter United States.
Since the act only limit the immigrants from Eastern Hemisphere, it provide a lot of opportunities for immigrants from Western Europe to come in and became a United States citizen.