Question

How did American exceptionalism help establish Regionalism as a literary movement?

Answer 1

The theory that the United States is qualitatively different from other nations.We have a sense of superiority based on our liberty,egalitarianism,individualism,republicanism,democracy. 

Answer 2

Answer:

It inspired authors to explore the unusually diverse mix of cultures that made up the country.

Explanation:

American exceptionalism  refers to the belief that the United States is a unique country in which anything might be possible. Therefore, it is based on the belief that America is vastly different from any other nation on the the planet.