Assuming that this is referring to the same list of options that was posted before with this question, it was the support from his staff that most significantly reflected his prosperity.
Answer
powers held by the states alone
Explanation
The tenth Amendment declares that the powers not delegated to the United States by the Constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the people. That is the states have all powers not granted to the federal government by the Constitution. The tenth Amendment of the United States Constitution is the section of the Bill of Rights that basically says that any power that is not given to the federal government is given to the people or the states.
Plz write in English
I don't think I understand
Pools were agreements between railroad corporations to divide the business in a given area and share the profits. Many companies formed these pools in order to avoid competition by dividing business in a particular area. Efforts to regulate the monopolizing practices of railroad corporation then first came in the form of action by the supreme court.
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