Question

what of the following revolutionized the steel industry? (1 point) the bessemer process the switchboard the mail - order catalog the bell company

Explanation:

The Bessemer Process was a major innovation in steel - making. It allowed for the mass - production of steel by blowing air through molten iron to remove impurities. This greatly increased the efficiency and reduced the cost of steel production, revolutionizing the steel industry. The Bell Company was related to telecommunications, the mail - order catalog to retail, and the switchboard to communication systems, none of which had a direct impact on the steel industry.

Answer:

the Bessemer Process