Answer:
c.a trial by a jury of one’s peers and double jeopardy
Explanation:
The two elements of the United States’s legal system that can be traced to Roman law is "a trial by a jury of one’s peers and double jeopardy."
This is evident in the fact that in the Roman republic, the trial by a jury of one's peers is well established whereby citizens are judged by their fellow citizens rather than the Emperor or King.
Also, double jeopardy is established in roman law that a person declared acquittal by a judge in a criminal case is exempted from further proceedings under the same charges.
The treaty added an additional 525,000 square miles to United States territory, including the land that makes up all or parts of present-day
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American Post-Civil War inflation, the demonetization of silver in Germany and the US, and a large trade deficit were all factors. If it wants the main cause, I'd probably say the demonetization of silver.
Generally speaking, a "mixed" economic system can be characterized by some government involvement and private ownership of most business, since some government regulation ensures the protection of the consumers.