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Which men were responsible for the development of the steel and oil industries in the United States?
Gustav Swift and Robert Kraft
Dale Carnegie and James Duke
Andrew Carnegie and John D Rockefeller
J.P. Morgan and Nelson Rockefeller

Answer :

It was largely "Andrew Carnegie and John D Rockefeller" who were responsible for the development of the steel and oil industries in the United States, since these men took great advantage of industrialization and finance. 
jaredjohannson

Andrew Carnegie and John D Rockefeller

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