The Populist Party, also known as the People's Party, was created initially as a farmer organization to discuss about the economic problems the government has caused for farmers. Later, they turned political as they discovered that they had more needs such as a secret ballot, income tax, etc. However in 1896, they didn't have enough money to run again, and thus, the party slowly diminished.
C. people began to demand basic rights from the government
The Enlightenment was all about natural rights.