Final answer:
The Populist Party platform should include Women's suffrage as a goal, reflecting the reformist movements of the era which also advocated for this right as part of democratic reforms.
Step-by-step explanation:
The correct answer to what should be added to the list of Populist Party platforms is A) Women's suffrage. The Populist Party, which emerged in the 1890s, had a platform that included a variety of reforms aimed at assisting farmers and the working class.
In addition to the goals listed, such as the elimination of the tariff, establishment of an income tax, and direct election of senators, the Populists also supported issues like the direct election of U.S. Senators, which was later ratified as part of the Seventeenth Amendment.
However, women's suffrage was also a significant part of reform movements during the same era, as evidenced by the overlapping interests of the Progressive Party, which included women's suffrage in its 1912 platform. Therefore, women's suffrage completes the list as a goal that aligns with the broader reformist sentiment of the time.