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Answer:
Option C, It allowed the Union Army to have total control of the Mississippi River, is the right answer.
Explanation:
During the Civil war, the battle of Vicksburg was one of the major victories of the Union. This battle took place between 18th May 1863 until July 4, 1863. In this battle, the Union forces were led by commander General Ulysses S. Grant while the Confederate forces were led by General John Pemberton. The outcome of the battle can be seen in the fact that the Union Army established its total control over the Mississippi river.
The answer is the Monroe Doctrine. This Doctrine was stated by the fifth President of the United States, James Monroe, on December 2, 1823, and became the foreign policy of the nation for many years.
The doctrine stated that:
●<em> The efforts of European nations to colonize land in North or South America, are considered as acts of aggression, requiring U.S. intervention</em>.
●<em> Any interference by European nations with states of North or South America would also be perceived as acts of aggression and would call for U.S. intervention</em>.
● <em>The United States would not interfere with existing European colonies</em>.
● <em>The United States would not get involved with the internal affairs of European nations</em>.