The most important reason was economical: slavery was profitable for slave owners in the South, and they were against its abolishing. The southern plantations were very work -intensive, so a lot of work was needed and slave labour was a very cheap source of labour that the owners didn't want to give up upon.
the correct answer is <span>B. The Southern plantation economy depended on slavery. </span>
I say C. because the entire paragraph is talking about political power.
-Britain started it first both physically and politically.
-Large populations of potential workers
-water power and coal to power machines
-iron to make tools, machines, and factories
-river transport
-harbors to ship and sell products
