How is marking ink on voter's finger related to fair elections?

Correct answer: It helps prevent multiple voting

Direct answer: A is correct. After a person votes, indelible ink is marked on a finger. Polling officials can then identify that the person has already participated in voting. This makes it much harder for the same person to appear again and vote a second time, which helps reduce multiple or bogus voting. The ink does not record whom the voter selected; the secrecy of the ballot protects that choice. It also does not choose a candidate or increase campaign spending. Therefore, option A is connected with a fair polling process because it supports the principle that one eligible voter should cast one vote. Option B is wrong because the ink does not reveal the vote choice. Option C is wrong because the voter, not the ink, selects among candidates. Option D is wrong because marking ink is an election-control measure, not a campaign expense. Memory cue: indelible ink means “already voted,” not “whom voted for.”