Answer: Gadsden Purchase, 1853–1854. ... Gadsden's Purchase provided the land necessary for a southern transcontinental railroad and attempted to resolve conflicts that lingered after the Mexican-American War .
Explanation:
I do most of those things myself
2: A
3: no idea sorry :(
4: C
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Form of government is most likely to lead to human rights violation is Democracy. HOPE THE ANSWER HELPS.....