It lasted 19 years, 5 months, 4 weeks and 1 day
I believe the answer would be B.civilian. I really hope this helps!
John D. Rockefeller vertically integrate his monopoly in 1882 as D. He purchased iron mines around the country to add to his business.
<h3>What is monopoly?</h3>
It should be noted that monopoly simply means a market structure that is characterized by a single seller of a good.
In this case, John D. Rockefeller vertically integrate his monopoly in 1882 as he purchased iron mines around the country to add to his business.
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