Which of these types of communication is generally most effective at educating the electorate about candidates

c. campaign communication

Explanation:

To get into the office that one aspires for in a democracy, they will need to hold a campaign which is basically a marketing strategy aimed at convincing the electorate to elect the person.

The Campaign in its bid to get the candidate elected, will seek to educate the electorate on the candidate by communicating relevant information about candidates such as their background and standpoints on policy issues.

They will do this through a variety of mediums including social media, news, advertisement and even physical campaigning. Campaign communication encompasses various means to sell their candidate to the electorate and so are generally most effective at educating the electorate about candidates.

b) to encourage free trade