One of the Reasons for Southern Secession Was to Protect

One of the reasons for southern secession was to protect states' rights from a too-powerful federal government, so it was ironic that:

A) Jefferson Davis, president of the Confederacy, was not an especially strong supporter of states' rights.
B) the Confederate army was placed under President Jefferson Davis.
C) when the war ended, the South had a much larger bureaucracy than did the North.
D) the North was able to protect states' rights better than the South could.
E) to prosecute the war, the Confederate government had to assume a great deal of centralized control.