Respuesta :
The statement that best describes the process of vertical integration that Carnegie used is Carnegie's company controlled every part of the production of steel.
What is Vertical integration?
Vertical integration is a a method in which a company use to provide give a form of it's operations in which the company is Incharge of direct ownership of different stages of production process instead of depending on external contractors to be in charge.
Around 1870, Andrew Carnegie built a steel industry which he later monopolised. Both him and His associated managed the business and control the whole America Steel business.
Therefore, The statement that best describes the process of vertical integration that Carnegie used is Carnegie's company controlled every part of the production of steel.
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Answer:
D) Carnegie's company controlled every part of the production of steel.