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.