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Social Studies, 30.01.2022 21:20 MaryLIT

8. What was Carnegie's great breakthrough when it came to the manufacture of steel? a. He used the Bessemer process to make it fast and cheap.
b. He discovered how to use metals native to America to make it.
c. He realized that efficient production required electricity.
d. He installed kerosene lighting so his factories could operate 24/7.

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