The ratio of registered voters who vote is significantly higher for registered native-born citizen. Which event might explain the increase in the number of Republican representatives in South Carolina between 1865 and 1878?

A. Passage of the 13 thAmendment to the Constitution

B. Passage of the 14th Amendment to the Constitution

C. The Supreme Court decision in the Dred Scott case.

D. The Supreme Court decision in the Plessy v Ferguson case