Which three System Roles are ESX Server pre-defined?

Which three System Roles are ESX Server pre-defined? Select three.

A.
Administrator

B.
Virtual Machine Administrator

C.
Read Only

D.
No Access

E.
Virtual Machine User

Explanation:

Sample Roles- Sample roles are provided for convenience as guidelines and suggestions. These roles can be modified or removed.
Note:
No Access User is a System Role
Read Only User is a System Role
Administrator is a System Role
Virtual Machine Administrator is a Sample Role
Virtual Machine User is a Sample Role
All 5 of these Roles are ESX Server Predefined Roles!!!