Answer:
The correct answer here is the option D.
Step-by-step explanation:
Manifest Destiny was an idea and an ideology that was dominant during the development of the United States. As they became an independent nation this idea became even more clear. Manifest Destiny describes the belief of the US settlers that it was their destiny and their duty, bestowed upon them by God to acquire all the lands in the North America. The Louisiana purchase shows how the US expanded westward with this belief in mind.