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 advancement in steel - making, allowing for mass - production of steel at a lower cost. The other options (switchboard, mail - order catalog, Bell Company) are not related to steel - making advancements.

Answer:

the Bessemer Process