what business practices contributed most to andrew carnegie’s ability to form a monopoly?\ncombining his…

what business practices contributed most to andrew carnegie’s ability to form a monopoly?\ncombining his companies into one company and controlling all aspect of steel production\nfocusing on a single aspect of steel production\nusing profits to support charities and greatly improving his reputation\nincreasing his profits every year
Answer
Brief Explanations:
Andrew Carnegie used vertical - integration. By combining his companies into one and controlling all aspects of steel production (mining of iron ore, coal, transportation, etc.), he was able to eliminate competition and form a monopoly. Focusing on a single aspect wouldn't lead to a monopoly. Using profits for charities and increasing profits are not related to forming a monopoly in the production process.
Answer:
combining his companies into one company and controlling all aspect of steel production