5. What problem did Frederick Jackson Turner's frontier thesis

expose?

A. America's unique development could not continue in

the absence of a frontier.

B. Intervention in international affairs would cause

domestic interests to suffer.

C. The U. S. Navy needed to be modernized.

D. The purchase of Alaska was a bad idea.

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.