Answer:
Option C, the closing of the western frontier, is the right answer.
Explanation:
An argument that claimed that American democracy was established by the American frontier came to be known as the Frontier Thesis. This argument was presented by historian Frederick Jackson Turner in the year 1893. He argued that the primary result of the American frontier was American democracy along with a lower interest in high culture, violence and egalitarianism.
It made it harder for immigrants to become citizens and made it so the president could imprison non citizens.
<span> Even when Roman Empire collapsed?
Are there choices?
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When water changes from liquid to gas at its boiling temperature the process is called vaporization. When this phase change occurs at a temperature below the boiling point it is called evaporation.
