Sorry I'm late, but for other people with this question the answer is A: City Y is in the middle of a continent and City X is on the coast.
Answer: Today more people visit the Vietnam Veterans Memorial, which was dedicated in 1982, than any other site in Washington D.C. A moving Vietnam War Memorial tours the country and there are virtual memorials on the Internet. Every soldier whose name is on the Vietnam Memorial Wall has a hometown and a story.
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Hope it help
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i believe the answer is either a or b :)