Adopting progressive reforms into its own platform
The answer is pluralism.
Completing the sentence:
The fact that the farmers have more influence over agricultural price-supports than do other groups is an example of pluralism.
Quick definition:
Pluralism is the holding of two or more offices or positions at the same time. Pluralism is not diversity alone, but the energetic engagement with diversity.
That would be survey research.
Surveys are used for the political polls as they are very good and appropriate for this kind of research as they consist of questions that have the aim of eliciting the specific information and data from the people about a particular subject. Surveys can take a wide variety of forms be that a simple phone interview or a kind of online survey.