How did the tariffs controversy expose sectional differences between the North and South?

A) The North manufactured goods to sell mainly in the United States, while the South survived on exports.

B) The North manufactured goods to sell mainly to the Southern states, but the South preferred imports.

C) The Southern states manufactured cotton textiles to sell in the United States, but the North survived on exports.

D) The Southern states needed federal aid to build factories, and the North did not want to pay for it.

I'm pretty sure it's A. I just want to get it right.