A.Individualclientsareconfiguredunderclientgroupsintheconfigurationhierarchy. B.Clientgroupsareconfiguredunderindividualclientsintheconfigurationhierarchy. C.Clientgroupsarereferencedinsecuritypolicyinthesamemannerinwhichindividualclientsare D. E.Clientgroupsareusedtosimplifyconfigurationbyenablingfirewalluserauthenticationwithoutsecurity