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If I'm correct it should be "Box 147, Rapid City, South Dakota."
The reason that is - is because we need a pause between when the city is being said and the area is being said.
Because there is such a sudden change in direction, they will naturally be pulled off the car. I cant really give an exact answer to this, cuz I'm not really sure, its just something you know will happen :/
The correct answer is indeed a rhetorical question.
Rhetorical questions are those questions which don't necessarily need an answer. They just show us what somebody is thinking about, and it doesn't mean they want their question answered. This is what the excerpt above is about.