How is the LDAP administrator account configured when the rootdn and rootpw directives are not present in the slapd.conf file?

How is the LDAP administrator account configured when the rootdn and rootpw directives are not present in the slapd.conf file?
A . The default account admin with the password admin are used
B . The account is defined by an ACL in slapd.conf
C . The default account admin is used without a password
D . The account is defined in the file /etc/ldap.secret
E . The account is defined in the file /etc/ldap.root.conf

Answer: B