Answer:
The correct option is: "the Mexican-American War"
Explanation:
It was the the Mexican-American War that brought about the need or desire to begin an expansionist policy with regard to foreign affairs, since the end of this war ceded a lot of new territory that was used by settlers moving west.
<span>because the Japanese left tiny clues for the other Japanese to find but instead the American found it</span>
Christopher Columbus was a villain because he killed and enslaved natives