Which Join the Group permission setting guarantees that you select or approve every individual who becomes a group member?

The permission setting that guarantees you select or approve every individual who becomes a group member is "Only invited users." This setting means that group membership is exclusively controlled by the manager or owner of the group, requiring them to specifically invite each member. As a result, only those individuals who have been invited can join the group, ensuring that the manager has complete oversight and control over membership.

In contrast, "Anyone can ask" allows any user to request membership, which would still require approval, but does not give the manager direct control over who joins without involving a request process. "Anyone can join" removes the need for any approval, allowing users to join automatically, which undermines the level of control over group membership. Lastly, "Manager approval required" means that while the manager must approve requests to join, it still allows individuals to request membership without a direct invitation, hence the manager does not have the same level of guaranteed control as they would with the "Only invited users" setting.