Question

which technique was one way andrew carnegie dominated the american steel industry in the late 1800s?
o international mergers
o union oversight
o vertical integration
o corporate financing

Explanation:

Andrew Carnegie used vertical integration to control all aspects of steel - making, from raw materials to production and distribution, which helped him dominate the American steel industry in the late 1800s. International mergers were not his main strategy. Union oversight was not how he dominated. Corporate financing was important but not the key technique for his dominance.

Answer:

vertical integration