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Answer: Rockefeller combined many corporations into a trust
The way that Rockerfeller's monopoly was different from Carnegie's was that Rockefeller combined many corporations into a trust.
How did Rockefeller start a monopoly?
In order to control the huge monopoly that he did on oil, Rockefeller combine various oil companies into a single trust.
Carnegie on the other hand, acquired companies in the supply chain of steel manufacturing which allowed for a steel monopoly to form.
Find out more on Carnegie at https://brainly.com/question/16530025.
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