Which group membership condition must be added to the RADIUS network policy for the Sales team?

The correct choice indicates that the RADIUS network policy requires users to be members of the Sales user group to gain access or specific permissions associated with that policy. By adding this group membership condition, the policy ensures that only users who belong to the Sales team will be authorized based on their group status.

Implementing this condition is significant for security and compliance, as it limits access to network resources strictly to individuals within the Sales team. This setup helps in managing user permissions effectively, ensuring that only relevant staff has access to sensitive information or resources tailored to their job functions.

The alternative options don't provide the targeted control or specificity defined within network security policies. Membership from the Admin group, allowing all groups, or adding users individually would lead to broader access and reduce the oversight inherent in a privilege-based access model. Such lax policies could potentially expose the network to unauthorized access or misuse, contravening the principle of least privilege.