Concept:A manifesto is a political party's official published statement of its policies and plans, shared with voters during an election period.
Explanation:Consider the purpose of each document listed in the options.
A constitution is the fundamental law of a state that defines the structure and powers of government.
An electoral register is the official list of people who are qualified to vote in an election.
A manifesto is the document in which a party sets out its programmes, goals, and promises for governance.
It is produced to inform the electorate and persuade them on election day.
A white paper is an official government publication containing proposed policy measures.
Since the party's programme and campaign guide for voters are presented in its manifesto, the correct choice is C.
Answer:C. manifesto