It would be "(A) Institution of a secret ballot" that was not part of the Populist Party’s platform, since the Populists were largely about transparency--both within government and big business.
During the Gilded Age, most laborers were considered to be in the working class. inequality and social ills as the working classes and poor were forced to work more and more for less and less.
FDR's Court Packing Plan was a mistake because, it appeared to interfere with the Separation of Powers under the United States Constitution.
