Which of These Statements Most Accurately Describes the Party Identification

Which of these statements most accurately describes the party identification of black Americans?

A) Since the Civil War, blacks have been strongly committed to the Democratic Party
B) Although they used to be Whigs, blacks today tend to strongly support the Republican Party
C) Although they were strongly committed to the Republican Party for about 100 years after the Civil War, they have been strongly committed to the Democratic Party at least since the 1960s
D) Today, black Americans are not strongly committed to either party