The Populist platform that Mary E. Lease was known for was called the People's Party.
Hope this helps.
Pennsylvania.
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The PPC (or PPF, same thing) shows economic growth because it outlines exactly what the economy can produce at that moment. When it shifts outward in any way (be it towards consumer and capital goods, or X and Y), that MUST be because of economic growth.
The answer is C. Skeptics about the power to make a difference