Answer: c. Strive for superiority
Explanation:
the answer is caste system
<span>The areas that the United States expanded territory in during the 1830s and 1840s was the northwest and southwest region, this included what is now known as California, Nevada, New Mexico, Texas, Utah, and Arizona. The expansion happened westward because people wanted a better life, they wanted new markets, an in the case of some people like Mormons, they wanted a better type of freedom. The land was cheap and everyone believed that Americans were meant to develop the area.</span>
Answer:
The US became involved in new international alliances.
Explanation:
The united states couldn't let the other world power (Soviet Union) obtain any ground or allies, and in order to stop the spread of communism the US threw themselves at every international conflict possible.