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The answer to this would be C. The other two would not make sense or fit for the time period. Also c is true, just learned this in history too!
Answer:The surge of pride in America at the time of Manifest Destiny pushed the expansion of the US into the western territories and lead to the annexation of Texas, all of Mexico's western lands, California and more. ... Politics, fear of war with Mexico and fear of another country getting them.
Explanation: