Marriages That Cross Racial and Ethnic Lines Have Become More

Marriages that cross racial and ethnic lines have become more common in the United States,although most U.S.marriages are still racially and ethnically endogamous.What factors might discourage exogamy?

A) having opportunities to interact with members of other racial/ethnic groups
B) living in a region where racial attitudes are more tolerant
C) facing ostracism from within one's community
D) having parents and close friends who support racial intermarrying