Answer:
You got to swallow another one that's how I got the first one out
B) superior geographic knowledge of the region
The right answer would be the third one: That was the derogatory term that others called her family.
The poem speaks about the reality of prisoners of war, and in this specific context, the japanese people in Vietnam, after the strategic destruction of dams around a local river.
The reason why they would not sell anything to them at the town, was because of the conflict that arose, which led them to be seen as enemies.
It was a vastly richer larger and more powerful than it had been one hundred years before