In the course of his career, Andrew Carnegie mastered all of the following industries except Question 4 options: the telegraph business , the oil business , the steel business , the retail business
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kemranki0928
ANSWERS: 1
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He was clearly associated with the telegraph business where he got his start -- but he was never a major player in the industry. The steel business is where he was the true master. He created what was, when combined with a fewer other companies, the largest steel company -- U.S. Steel -- that the world has ever know. He never did anything in the retail sector. Although he worked in conjunction with the oil magnets of the time, he couldn't be said to have mastered the industry.
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