Answer:
The correct answer is B. The act that established ideology as the main criteria for admission into the United States was the McCarran-Walter Act of 1952.
Explanation:
The McCarran-Walter Act is a U.S. federal law from 1952 that regulates immigration to the United States.
Racial restrictions that existed until then were abolished at the law, but a quota system was maintained and the policy to limit the number of immigrants from certain countries continued. The law also determined which ethnic groups should be preferred for immigration. Based on the law, applicants with special professional qualifications are generally preferred.
The law allows the government to expel immigrants or naturalized Americans involved in subversive activities and to prevent people suspected of such activities from entering the United States. This provision was used until it was abolished in 1990 to prevent members, former members and fellow travelers of the Communist Party from entering the United States.
