Manifest Destiny, coined by John O'Sullivan, expressed the idea that America had the "destiny" to expand across North America, carrying American culture from coast to coast. This philosophy became the justification for:
1-A war against Mexico for the South-West territories (Texas - California).
2-The capture and the settlement of Montreal during the War of 1812.
3-Debates in Congress over whether newly settle territories would allow slavery, such as the Missouri Compromise and the Compromise of 1850 (because "American Culture" to some citizens included slaves, and to others, it did not).
4-Forced removal of the Cherokee Indians (and other tribes) from Georgia & Alabamba to Oklahoma.
5-The inspiration for many of Darth Vader's "Destiny" lines in the popular Tennessee frontier stories that would one day become the basis of the Star Wars series.
I assume that this is meant to be a multiple choice question and I assume that it has only one possible answer. If that is the case, the best answer is Option 1. I will explain why each of these options is or is not correct. I assume that Option 5 is a joke. As far as I know, Star Wars is not taken from any Tennessee frontier stories.
Option 2 would be plausible as it concerns American expansion. However, the US did not capture and settle Montreal during the War of 1812. Therefore, this option cannot be correct.
Option 3 is connected to Manifest Destiny, but Manifest Destiny is not a justification for it. Discussions about slavery had to occur, in part, because Manifest Destiny caused the US to expand into the Midwest and West. However, Manifest Destiny did not justify the discussions, it just made them necessary.
Option 4 could possibly be a correct answer. The Indian Removal referred to in this option did come about because of attitudes similar to the attitudes that caused Manifest Destiny. However, O’Sullivan’s article was not published until 1839, after Indian Removal had already happened. If you are allowed to give more than one answer to this question,Option 4 could be correct, but it is not as good as Option 1.
Option 1 is clearly correct. Manifest Destiny is widely seen as the major cause of the war with Mexico. This was a war meant to expand American control at the expense of a “lesser” society. It was a war that occurred after O’Sullivan’s article. This makes Option 1 the best choice for this question.