Which of the following statements about the Samba 3 server are true? (Select THREE correct answers.)

A.
The server can be a Domain Controller on an ADS domain.

B.
The server can join an ADS domain as a member.

C.
Provided the necessary UNIX groups are created and mapped, the server can automatically migrate usernames to the local SAM.

D.
User and group IDs are mapped to an LDAP backend by default.

E.
The server password backend supports LDAP operations.