Which method should be used to grant an unrelated group of users access to a...

A Public Group is the standard reusable container for users who need common record access but do not share a natural position in the role hierarchy. Public groups can include individual users, roles, roles with subordinates, and other groups, then be referenced by sharing rules or manual sharing. The role hierarchy is intended for vertical access based on organizational responsibility, so forcing unrelated users into one role would distort the security model. Sharing Sets serve a different purpose: they are relationship-based Experience Cloud mechanisms that map an external user ' s Account or Contact relationship to target records. For unrelated internal users, the architect should create a public group and then use that group as the recipient in the appropriate sharing mechanism. This centralizes membership management and lets the record-sharing rule remain stable even as individual users change. Study Guide reference: Access to Records - Public Groups, sharing-rule recipients, cross-functional access, role hierarchy, and scalable record-sharing design.