The correct answer is: (1) limits on immigration established by the
Quota Acts.
The Immigration Act of 1924 limited the number of immigrants allowed entry into the United States through a national origins quota. The quota provided immigration visas to two percent of the total number of people of each nationality in the United States as of the 1890 national census.
U.S. law limits the number of prospective immigrants who may be admitted annually. The Immigration Act of 1990 establishes an annual limit of 700,000 visas for quota-restricted immigrants.
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