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Which of the following inventions was necessary to the success of the multistory skyscraper?

SAT · US History · previous-year question

  1. A.Giuseppe Marconi's radio telegraph
  2. B.Thomas Edison's lightbulb
  3. C.Elisha Otis's elevator
  4. D.Henry Ford's Model-T automobile
  5. E.Alexander Graham Bell's telephone

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