How did the southern states get back into the union after the civil war apex?

They got back after the Reconstruction .White Southerners were deprived of their voting rights after the end of the Civil War, the Reconstruction ended in 1877 when the military occupation of the South ended. It was when the South joined the Union again.

Through the Reconstruction process

Explanation:

apex

what are local authorities doing to fix the problem

explanation: what are local authorities doing to fix the problem

i believe your answer is d)