What was the belief used to justify westward expansion of america’s borders in the 1800s

Manifest Destiny (b)

Explanation:

In 1845, John L. O'Sullivan believed that God wanted Americans to broaden the United States to the Pacific Ocean. Manifest Destiny means "Obvious Purpose," so he is saying that the purpose is obvious that people are going to expand west. Hope this helps

answer: the risk-return relationship. generally, the higher the potential return of an investment, the higher the risk. there is no guarantee that you will actually get a higher return by accepting more risk. diversification enables you to reduce the risk of your portfolio without sacrificing potential returns.

explanation:

it was the "4. potsdam" conference that demanded the unconditional surrender of japan, since it was clear that the japanese would continue to find until the very last man otherwise.