The NWSA formed in 1869 and dissolved in 1890 so therefore the answer would be a.1800s
The correct answer is C. Confederate troops
This changed over time, however it did last for a while.
As the Cold War heated up in the 1950s, the United States made decisions on foreign policy with the goal of containing communism. To maintain its hegemony in the Western Hemisphere, the U.S. intervened in Guatemala in 1954 and removed its elected president, Jacobo Arbenz Guzman, on the premise that he was soft on communism.