Which of the Following Statements Explains Why Ethnic Homogamy Is

Which of the following statements explains why ethnic homogamy is declining in western societies today?

A) Racism and prejudice have decreased over time.
B) People of different ethnic backgrounds are attending the same educational institutions where they can meet others of similar educational attainment.
C) More interracial couples are being depicted on television and in movies.
D) Young adults whose parents support ethnic homogamy are rejecting are rejecting their cultural backgrounds in favor of western mating norms.