Final answer:
The best example of a claim is that 'All Americans should be required to vote in federal elections,' as it provides an argument for changing current policy rather than stating factual information.
Step-by-step explanation:
The statement that is the best example of a claim is: All Americans should be required to vote in federal elections.
Claims are often used to make an argument or advocate for a particular action or change. In this case, the claim proposes a policy change, suggesting that there should be a mandate for all Americans to participate in federal voting processes. It indicates that the act of voting should not just be a right but an obligation. Such a statement is contrast to other statements that simply present factual information, such as 'The voting age in this country is 18' or historical details like 'Women have only had the right to vote for a century.'