Why was the mississippi river important to americans that had moved west after the revolution?

a)it created a barrier between the united states territory to the east of the river and english territory to the west.

b)it gave them access to new orleans and a way to reach markets around the world to sell produced crops.

c)it connected them directly to the french in new orleans, their biggest supporters during the war.

d)it provided a source of water needed to irrigate essential crops.