Final answer:
The Bessemer process had a significant impact on the Industrial Age by enabling the mass production of affordable steel, which became essential for construction and infrastructure.
Step-by-step explanation:
Among the options provided, the Bessemer process had a major impact on the Industrial Age. The Bessemer process, an innovation developed by English inventor Henry Bessemer, was one of the new steel production methods after the Civil War that significantly changed the way the United States produced steel.
Along with the open-hearth process, it led to the creation of furnaces large enough and hot enough to melt wrought iron, allowing the production of large quantities of steel at affordable prices. As steel became increasingly available, its demand soared for the construction of buildings, railroads, and other infrastructures, propelling the country into a new, industrialized era.