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Which of the following machines, invented in 1793, was primarily responsible for an economic boom in the South?

SAT · US History · previous-year question

  1. A.Eli Whitney's cotton gin
  2. B.Robert Fulton's steam engine
  3. C.Henry Bessemer's steel converter
  4. D.John Deere's tractor
  5. E.Edwin L. Drake's oil drill

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