Which of the following is not a responsibility of media in the democratic process? a. perform criminal background checks on all the candidates. c. investigate a candidate's leadership and service record. b. promote the policies that are under consideration. d. report on debates and policy explanations.

The correct answer is A.

Media definitely have a major significant role in the democratic process. On one side, they promote the needs of citizens and the sort of policies they demand and, on the other hand, they create public profiles of each political candidate and they try to assess whether each aspirant would properly serve the interests of the citizenship or not.

To create these candidate profiles, the media will assess their former careers and services in other public offices, if any. But the media do not have the responsibility of conducting criminal background checks on them.  

there is an explationation of this on a site called crash   course world history 1