Claim: The voting age should be lowered to 16.

Which source would provide information that is most relevant to the claim?

a book written by a history professor about the history of voting rights

an interview with a politician who supports lowering the voting age

a survey conducted by a university on the views of teenagers on voting

an entry on a personal blog by a person who is active in local politics

The most relevant source to provide information on the claim would be:

a survey conducted by a university on the views of teenagers on voting.

This source directly captures the perspectives of the target age group (16-year-olds) who would be affected by the potential policy change. The survey would shed light on teenagers' level of political interest, knowledge, and maturity, helping evaluate their readiness to participate in the democratic process.