Answer: a. Most Southern capital was devoted to slavery and plantations.
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.
Congressional leaders form CONFERENCE committees when they want to take up an issue that falls between the jurisdiction of existing committees, to highlight an issue, or to investigate a particular problem.
One reason why this is believable is because di Coppo Di Stefano Buonaiuti was in Florence at the time when the Black Death hit Florence in 1338. One reason why this passage isn't believable is because he was only two when it happened so might not remember it all.