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How did John D. Rocketfeller achieve control of 90% of the oil market?

A. Through horizontal integration
B. By splitting into many small firms
C. Through federal grants
D. By discovering huge oil reserves in Alaska

2 Answers

6 votes

Answer: A

the answer is A : throught horizontal integration.

User Mark Pim
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The answer is A. Rockefeller was into big business and capitalism. Horizontal integration is merging two companies that serve the same purpose to get a monopoly on the market
User Jeremy Bell
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