Answer:
Carnegie turned his one Pennsylvanian production plant into a veritable steel empire through a business tactic called vertical integration.
Explanation:
Andrew Carnegie was a Scottish-American industrialist and philanthropist. Carnegie led the expansion of the American steel industry in the late 19th century and became one of the richest Americans in history. He became a leading philanthropist in the United States and in the British Empire.
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Advantages of Westward Expansion include the gold rush, mining opportunities, the cattle industry, being a cowboy, traveling by railroad, more availability of supplies, and being able to own land cheaply and effectively.
