What exactly are you trying to figure out
The reason why the Peace Corps were established in 1961 was because they wanted to train local men and women to meet the needs of people in developing countries - A.
It was envisioned that trained soldiers from the US would go to deveoping countries and help their country develop into peaceful and stable countries.
The destruction that resulted from war or siege including the purposeful burning of an enemy city’s fields.
Https://www.army.mil/article/49291/pershings_decision_how_the_united_states_fought_its_first_modern_coalition_war
this might help you :)
B, because the others have story elements that frequently appear in historical fiction. Not to mention how the only choice that used the word “historical” is B