Which procedure unconfigures an LDAP client?

Which procedure unconfigures an LDAP client?

A.
run the following command: ldapclient -v uninit

B.
restore the previous /etc/nsswitch.conf file and reboot

C.
run the following command then reboot: ldapclient -v mod

D.
remove any LDAP client files from the /var/ldap directory and kill the ldap_cachemgr process