The correct answer is D. enforce new laws in the South. The problem was that there were still a lot of racially discriminatory laws in the south and a lot of social discrimination which made it difficult to enforce new laws,such as the prohibiton of racial discrimination of voting.
1.) Must be at least 25 years old.
2.) Have been a citizen in the United States for at least 7 years.
3.) Must be a inhabitant of the state they represent.