How was Carnegie able to create such a
successful monopoly?
O He focused on one aspect of the steel
industry, which made him an expert in steel
production.
He drove down steel prices, which put his
competitors out of business.
He created a trust first, which made it easier
to create a monopoly.

the answer is he drove down steel prices, which put his competitors out of buisness.

Explanation:

i do not know if this question has options, but a main impact of the federal reserve act of 1913, which created the federal reserve bank, was the international use of the u.s. dollar, which soon became the world's leading currency - particularly during world war i, since many nations around the world asked the united states for money.

i would go with the last one