Question

what problem did frederick jackson turners frontier thesis expose? (1 point) americas unique development could not continue in the absence of a frontier. intervention in international affairs would cause domestic interests to suffer. the u.s. navy needed to be modernized. the purchase of alaska was a bad idea.

Explanation:

Frederick Jackson Turner's frontier thesis emphasized the role of the frontier in shaping American development. It posited that the availability of a frontier had been crucial for America's unique growth (e.g., fostering democracy, individualism). When the frontier was declared closed (as per the 1890 Census Bureau announcement), Turner's thesis suggested that without this frontier, America's development trajectory (which had been influenced by frontier - related factors like land availability for economic opportunity and a safety - valve for social tensions) would be disrupted.

Answer:

America's unique development could not continue in the absence of a frontier.