How Did the Federal Government React to the Spread of Jim

How did the federal government react to the spread of Jim Crow laws in the late nineteenth century?

A) The federal government sent in additional troops to enforce the Reconstruction amendments.
B) Congress passed legislation to prevent political discrimination, but allowed social discrimination to continue.
C) The federal government did not interfere because it was a states' rights issue.
D) The laissez-faire attitude of the Republican presidents of the era prevented any action.
E) The Supreme Court rulings supported a reduction in civil rights for blacks.