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 cheap and efficient way to produce steel by blowing air through molten iron to remove impurities. It greatly increased steel - making productivity and reduced costs, revolutionizing the steel industry. The switchboard is related to electrical communication, the mail - order catalog to retail, and the Bell Company to telecommunications.

Answer:

the Bessemer Process