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3 votes
PLEASE HELP IS DUE IN 10 MINS!!!

What made Standard Oil a horizontal integration monopoly?
It controlled all aspects of oil production.
It owned ninety percent of US oil refineries.
It formed a trust.
It operated all across the United States.

1 Answer

3 votes

Answer:

they owned 90% of the us oil refineries

answered
User BenL
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