To interpret the Constitution and Constitutionality of laws already made
Answer:
Carnegie was able to monopolize the steel industry from 1889 to around 1901 when he sold his business to J.P. Morgan, the U.S.'s most prominent banker. John D. Rockefeller founded the Standard Oil Company, which dominated the oil industry and was the first great U.S. business trust.
Explanation:
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President Harry Truman. Western European countries(NATO).
