Americans used manifest destiny to justify what?

a. A limit on the number of immigrants entering the country.
b. A warning to European countries about getting involved in American politics.
c. The use of military force to solidify control of the area east of the Appalachian mountains.
d. Expanding the territory of the United States to the Pacific Ocean.

d. Expanding the territory of the United States to the Pacific Ocean.

d. Expanding the territory of the United States to the Pacific Ocean.

The correct answer is d. Expanding the territory of the United States to the Pacific Ocean. Manifest Destiny was a belief that emerged in the 19th century which held that it was the destiny of the United States to expand its territory from the Atlantic to the Pacific. It was used to justify westward expansion and the annexation of new territories. To arrive at the correct answer, you would need to understand the concept of Manifest Destiny and its implications in American history. By knowing the historical context and the reasons behind American westward expansion, you can determine that the correct justification for manifest destiny was to expand the territory of the United States to the Pacific Ocean.