When assigned to the ref attribute for ou=people,dc=example,dc=com, which of the following values will create a subordinate knowledge link to slave.example.com? A. ldap://slave.example.com/ou=people,dc=example,dc=com B. ldap://slave.example.com?ou=people,dc=example,dc=com C. ldap://slave.example.com ou=people,dc=example,dc=com D. ldap://slave.example.com,ou=people,dc=example,dc=com