Populist Effect on the
Nation

Explanation:

The effect of the fusion of the Populist Party and the Democratic Party was a disaster in the South. Though there had always been conflict within the Populist movement about whether African Americans should be included, the Democratic Party in the South was unabashedly racist. Though Bryan performed strongly in the areas of greatest Populist influence, he lost the election to Republican William McKinley

i believe it d) heterogeneous

its many islands, high mountains, and remote peninsulas isolated population centers.