Which of the Following Actions Synchronizes UNIX Passwords with the Samba

Which of the following actions synchronizes UNIX passwords with the Samba passwords when the encrypted Samba password is changed using smbpasswd ?

A) There are no actions to accomplish this since is not possible.
B) Run netvamp regularly, to convert the passwords. Run netvamp regularly, to convert the passwords.
C) Run winbind -sync , to synchronize the passwords. winbind -sync , to synchronize the passwords.
D) Add unix password sync = yes to smb.conf Add unix password sync = yes to smb.conf
E) Add smb unix password = sync to smb.conf smb unix password = sync