What of the following revolutionized the steel industry?

A.
the Bessemer Process

B.
the switchboard

C.
the mail-order catalog

D.
the Bell Company

Respuesta :

Answer:

Option A, the Bessemer Process.

Explanation:

Andrew Carnegie revolutionized the steel industry with the introduction of the Bessemer process in 1875. The Bessemer process was a way to mass-produce steel cheaply and quickly.

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A). The Bessemer process