Answer:
C. Purchasing the Louisiana Territory for the price of $15 million
Step-by-step explanation:
Robert Robert Livingston was a New York politician, lawyer, and diplomat best known as one of the Founding Fathers of the United States.
Born in New York City in 1746, Robert R. Livingston worked as a lawyer before serving as a politician, diplomat, and chancellor of the state of New York.
When Jefferson introduced himself to the presidency, Livingston was one of his supporters. Under Jefferson, Livingston became a plenipotentiary minister in France from 1801 to 1804.
It was during this period that he joined James Monroe to elaborate on the terms of the Louisiana Purchase to the Napoleon Bonaparte regime.