in which business did andrew carnegie create a monopoly?\nthe oil business\nthe automobile business\nthe…

in which business did andrew carnegie create a monopoly?\nthe oil business\nthe automobile business\nthe telephone business\nthe steel business
Answer
Brief Explanations:
Andrew Carnegie was a prominent industrialist known for his dominance in the steel industry. He built the Carnegie Steel Company and played a major role in creating a monopoly in the steel business. The oil business was dominated by John D. Rockefeller, the automobile business by figures like Henry Ford (later), and the telephone business by Alexander Graham Bell - related enterprises.
Answer:
D. the steel business