Answer: a. Most Southern capital was devoted to slavery and plantations.
Step-by-step explanation:
The Southern states based their economy on agriculture and farmed large plantations with enslaved labor. This enabled them to export goods like cotton, tobacco, sugar cane and other cash crops. As this was their primary way of making money, they devoted their capital to it.
The North on the other hand, boasted of industry that they used to convert the goods acquired from the south into finished goods so that when the civil war broke out, they had much more industries than the south.