Answer: Option (D). referendum
Explanation: Referendum is a direct and universal vote in which electorate is invited to sign on a particular proposal and can have nationwide or local forms.
A referendum is a process that is direct and universal vote in which an entire electorate is invited to vote on a particular proposal and can have nationwide or local forms. This may result in the adoption of a new policy or specific law. Going door-to-door with a petition trying to get enough signatures for a proposal to be voted on by citizens, the process is called referendum.
