A. They feared the consequences of African Americans having political power.
Explanation:
To disenfranchise means to take away a person's right to vote. This was always an issue with African Americans during the Reconstruction. The Southern Democrats were worried that giving the African Americans the right to vote would encourage their participation in politics, which would in turn challenge their political strategies and policies. The Democrats did everything they could to prevent black men from registering to vote despite the fact that the 15th Amendment gave them suffrage.
