Answer:
A. America's unique development could not continue in the absence of a frontier.
Explanation:
He stressed the process—the moving frontier line—and the impact it had on pioneers going through the process. He also stressed results, especially that American democracy was the primary result, along with egalitarianism, a lack of interest in high culture, and violence.
George Washington was the first president of the United States.
The United States of America has changed through time, so has done the world. The Bill of Rights written during the XVIII century, added to the Constitution specific personal freedoms and rights reserved for each State, that are still followed.
Despite the fact that some decisions may raise unease among people, the whole society respects each state freedom. The best current example that can be given here is the abortion law that is treated differently depending on the State.