The Democratic Party's support for the Civil Rights Act of 1964 and the Voting Rights Act of 1965 had what impact on the Solid South?
A
It strengthened the Solid South by causing many African Americans to become Democrats.
B
It led to the end of the Solid South by convincing many southerners to become Republicans.
С
It strengthened the Solid South by convincing many Dixiecrats to become Democrats.
D
It led to the end of the Solid South by causing many Republicans to become Dixiecrats.