Final answer:
The Great Plains farmer would be most likely to support the Populist Movement in the late 19th century.
Step-by-step explanation:
The Great Plains farmer would be most likely to support the Populist Movement. The movement, also known as the People's Party, emerged in the late 19th century and aimed to address the concerns of farmers who were facing economic hardships and unfair practices by big businesses. The Populists sought reforms such as government regulation of railroads, a graduated income tax, and the unlimited coinage of silver to increase the money supply and ease debt burdens on farmers.
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