Why was Carnegie Steel considered a vertical monopoly? The company controlled every step of steel production, from raw materials to distribution.
The company controlled all the steel plants in the country.
The company became the only source of steel after competitors went out of business.
The company was able to produce more steel than any other steel company in the world.

The company controlled every step of steel production, from raw materials to distribution.

Explanation:

Andrew Carnegie introduces the steel industry in the late 19th century in the United States. Carnegie Steel Company revolutionised steel production in America. He built factories using technology that made producing steel faster, easier and more productive. The supply chain of the steel is checked and owned by that steel company. Carnegie Steel company control the raw materials and the finished products.