Answer:
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.
America needed new markets for its goods, not a source of raw material for industries.
"C. the results of the Mexican War"