Answer:
Dissatisfaction from the Spanish rule and treatment
Explanation:
Latin America, in general, was under the rule of the Spanish crown. The Spanish didn't really do anything in particular to develop their colonies, but instead they started to stagnate, while the majority of the people were living in bad conditions, and they were also treated very badly by the Spanish authorities. This started to revolt the people, so once they had proper leaders, and Spain was not in the best situation to be able to resist their revolutions, they revolted. The revolutions were successful, and one by one the Latin American colonies gained independence, ruining the Spanish empire in meantime.
The correct answer is C. The closing of the western frontier.
In his 1893 published paper, The Significance of the Frontier in American History, Turner stated that while it was technically true that the frontier was closed, it was the frontier life that shaped the success of the United States. His idea, which was summarized in his frontier thesis, traced the development of the United States using the settlement of the West as a measure. He argued that early settlers were essentially Europeans; they had European values and European character, but because of the frontier experience, they had to adapt, resulting in their placing a greater value on things like ingenuity, democracy and individualism. Furthermore, it was these experiences of living out in the frontier that led to settlers becoming distrustful of authority, less artistic, and more violent.
Portugal. Just took the test :)