Of the following statements, which one is the most accurate regarding the political outcomes of the civil rights movement?

A. By the mid-1960s, half of Arkansas's elected political figures were African American.
B. African Americans did not gain their right to vote until the civil rights movement came to an end in the 1970s.
C. The percentage of voting-age African Americans who voted increased throughout the 60s and 70s.
D. Governor Faubus sponsored bills to gain the support of African American voters.

C. The percentage of voting-age African Americans who voted increased throughout the 60s and 70s.