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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It was a new way to solve problems and do research.
Should be Mekong, because nations like Thailand, Vietnam all have the Mekong running through it
Answer:
You have to remeber that in this period of US history there is no "republican". There are the Whigs and the Democrats. Democrats wanted to expand and spread slavery, while the Whigs were from the North, against mass expansion and against slavery. Do with this information as you will.
Explanation: