What problems did the United states face after independence from Britain A economic problems of dept and depression
B political tensions due to a second revolution in Washington DC
C civil war over the issue of representation
D a coup d’etat led by Henry laurens

Economic problems of debt and depression!

Explanation:

Like other nations born in anti-colonial revolutions, the United States faced the challenge of building a sound economy, preserving national independence, and creating a stable political system which provided a legitimate place for opposition. In 1790, it was not at all obvious that the Union would long survive.

they required less loading and unloading

explanation:

the shipping container improved shipping because it cut down on unloading time by three weeks, eliminated wasted space, and allowed ships to carry.