Ansel123 Ansel123
  • 16-07-2020
  • History
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Developments in which of these industries made important contributions to improve the transportation system in the United States during the second half of the 19th century

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crystalguzman0068
crystalguzman0068 crystalguzman0068
  • 16-07-2020

Answer: Developments in steel made important contrubutions

Explanation:

Steel contributed by using it to make railroads for travel and exportation

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