During a Linux security audit at a local college, it was noted that members of the deans group were able to modify employee records in addition to modifying student records, resulting in an audit exception. The college security policy states that the deans group should only have the ability to modify student records. Assuming that the correct user and group ownerships are in place, which of the following sets of permissions should have been assigned to the directories containing the employee records? A. R-xrwx B. Rwxrwxrwx C. Rwx-wx D. Rwxrwxr