Which Statement Best Describes Why New Orleans Was the Biggest

Which statement best describes why New Orleans was the biggest loser in the growth of the American West?

A) New transportation links with the West ran eastward to New York and New England, and therefore less western commerce passed through New Orleans.
B) High Spanish tariffs on trade made Americans in the West avoid New Orleans.
C) The Nashville‒Mobile canal diverted trade away from New Orleans.
D) The southern economy was increasingly agricultural, and southern planters refused to trade with "Yankees" to the North, causing New Orleans to stagnate.