Final answer:
William Jennings Bryan did not appeal to Populists by advocating for higher tariffs. He did support free silver, came from farm country, and backed the subtreasury system.
Step-by-step explanation:
William Jennings Bryan appealed to Populists in a number of ways, but one way in which he did not appeal to them was by advocating for higher tariffs (option D). Bryan supported free silver (option B), which was a central issue for Populists who believed it would improve the economic conditions of farmers. He also came from farm country (option A), which made him relatable to the farmers who made up a significant portion of the Populist movement. Additionally, Bryan supported the subtreasury system (option C), which was another key issue for Populists. This system aimed to provide loans to farmers using the value of their crops as collateral.