In the 1960's, the Republicans began to make gains in South Carolina primarily because the party

A) appealed to black voters.

B) appealed to women voters.

C) took an anti-civil rights stand.

D) supported civil rights legislation.

The answer is D.

In the 1960's, the Republicans began to make gains in South Carolina primarily because the party supported civil rights legislation. Republicans won over Democrats because the Democrats’ New Deal coalition collapsed in the mid-1960s, relatively because of white Southern Democrats' disaffection with the way of the 1964 Civil Rights Act.