Why is the voters' list updated from time to time?

Correct answer: To add new eligible voters and correct mistakes

Correct answer: C, to add new eligible voters and correct mistakes. Electoral rolls must reflect the current population of eligible and registered voters as accurately as possible. Updating can add citizens who have reached the voting age or completed registration, remove or change entries when legally required, and correct errors such as spelling or address details according to the prescribed process. A is wrong because slogans belong to election campaigns, not voter registration. B is wrong because booth decoration has no connection with maintaining the roll. D is obviously unrelated to election administration. Regular revision supports a more accurate and inclusive election, although citizens may still need to follow the official application and correction procedure. Memory cue: update the list when voters change—not when slogans or decorations change.