Because of political and social views of migrants
Comunisum and the start of the cold war

National Association for the Advancement of Colored People (NAACP), interracial American organization created to work for the abolition of segregation and discrimination in housing, education, employment, voting, and transportation; to oppose racism; and to ensure African Americans their constitutional rights.
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mark as brainlist
B is the right answer. All of the other options would show a decrease in the emphasis on knowledge and education.