The belief that the United States had a mission to expand westward was called Westward Movement.
Manifest Destiny.
American Progress.
American Destiny.8

The answer is Manifest Destiny. Although it can be referred to as the Westward Expansion.

so they can differentiate themselves from others as they saw themselves as the superior race. the star was basically a symbol that meant you are a less of a person than i am because of my race. the star was also degrading for those who had to wear it because they were aware of this and the nazis used the notion to make them feel less like a person.

the answer would be:

b. race