The correct answer is: c. Content Managers and Backup Operators
If John belongs to any of the other sets of group accounts, he has more permissions than he actually requires to perform his job. An even better application of this rule of least privileges is for John to have two accounts, one as a member of the Content Managers group and one as a member of the Backup Operators group. He can log on using the Content Managers account to manage the site's content and log on using the Backup Operators account to perform backup operations.
This was first published in June 2005