Answer:
"The South grew, but did not develop" prior to the Civil War, indicating that the South had failed to transform from an agricultural to an industrial economy.
Explanation:
This is my point-of-view please feel free to alter to your point-of-view.
B, because if you don't have anything to back up the argument then you will not have a steady argument making the "debate" on your side turn into an opinion.
Always look for similarities when comparing and contrasting.