What power does a challenger possess during an election?

A challenger during an election has the authority to question the eligibility of a voter, which is why the ability to challenge any person's right to vote is a key responsibility of this role. Challengers are typically appointed representatives of candidates or political parties, and their primary function is to observe the electoral process and ensure that it is conducted fairly and in accordance with the law. When a challenger questions a voter's eligibility, they must provide a valid reason for their challenge, which could relate to the individual's identity, residency, or other factors that determine their right to vote.

The other options do not accurately represent the role of a challenger. Voting on behalf of others is not permissible as each individual must cast their own vote. Certifying election results is the responsibility of official election officials, not challengers, and refusing entry to unauthorized personnel typically falls within the jurisdiction of election officials and law enforcement, not challengers. This understanding reinforces the specific authority and responsibilities that challengers have during the electoral process, highlighting the importance of maintaining the integrity of elections.