Any political movement that represents the interests of the “common people” is known as a-capitalism. b-populism. c-bimetallism. d-activism.

B-populism.

Explanation:

Populism is a set of political practices that are justified in an appeal to the "people," generally opposing this group to an "elite." There is no single definition of the term, which emerged in the nineteenth century and has come to mean different meanings ever since.