Which third party held beliefs most similar to those expressed by speaker d?

Speaker D: Since transportation is a public necessity, the government should own and operate the railroads in the public interest.

I believe the answer is the populist

Populist believe that the reglations created by the government should only be created for the importance of collective citizens as a whole rather than obeying the demand from interest groups. Therefore, they tend to favor public infrastructures and welfare programs.