Acme Disposal Services is a large company which has many administrators. For auditing

purposes, each administrator must use a unique account to access ESXi Standard hosts.
Which two actions satisfy this requirement and require the least amount of administrative effort?
(Choose two.)

A.
Configure Authentication Services for Active Directory based authentication to the ESXi hosts

B.
Configure a unique root level account for each administrator using the vSphere Client

C.
Configure user accounts in a host profile, then apply the host profile to the ESXi hosts

D.
Configure Active Directory group ESX Admins with each administrator’s AD account

Explanation:
http://pubs.vmware.com/vsphere-50/topic/com.vmware.wssdk.pg.doc_50/PG_Ch6_Authenticate_Authorize.8.3.html