Which of the following lines should be added to smb.conf to use authenticate users against the Kerberos domain bc.ep.kerberos.biz?

Which of the following lines should be added to smb.conf to use authenticate users against the
Kerberos domain bc.ep.kerberos.biz?

A.
Realm=bc.ep.kerberos.biz

B.
Krb5 workgroup=bc.ep.kerberos.biz

C.
Kerberos=bc.ep.kerberos.biz

D.
Krb5=/etc/krb5.conf