Question

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.

Explanation:

Vertical monopoly involves controlling different stages of production (e.g., raw materials, manufacturing, distribution). Carnegie Steel's control over all these stages fits this definition. The other options either refer to horizontal monopoly (controlling all similar firms like "all the steel plants"), sole - source due to competition exit (not vertical integration), or production quantity (not related to vertical monopoly structure).

Answer:

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