The answer is D. Remote rivalries drove the cost of cotton down. Because of Abraham Lincoln's Union Blockade, the South was not ready to showcase their a huge number of parcels of cotton. He had the careful step that Europe would intercede with the fare of cotton, however they didn't. Accordingly, cotton generation expanded in different parts of the world (e.g. India and Egypt) influencing America to lose its imposing business model in the cotton business.
The addition of the louisiana territory
Pretty sure it's a (New York city )
