Final answer:
The post-Civil War governorship of E. J. Davis is best described as a Republican leadership that used centralized power to maintain control over his regime in Texas during Reconstruction.
Step-by-step explanation:
The statement that best describes the post-Civil War governorship of E. J. Davis is that Davis was a Republican who used the centralized powers of the governorship to maintain control over his regime. The correct choice is therefore: c. Davis was a Republican who used the centralized powers of the governorship to maintain control over his regime. After the Civil War, during Reconstruction, Republican E. J. Davis served as governor of Texas and drew controversy for his centralized and often authoritarian method of governance. His tenure reflected the broader struggles and challenges of Reconstruction in the Southern states during the post-war era.