Which two are true regarding the procedure for removing one or more cluster nodes?

Your four-node cluster was originally purchased, installed, and configured three years ago. You
recently added another four nodes to the cluster.
Now you want to remove two of the older nodes that are still accessible to be redeployed
elsewhere in the data center. Which two are true regarding the procedure for removing one or
more cluster nodes?

A.
The procedure requires that all commands be invoked from one of the surviving cluster nodes.

B.
All commands are run as root regardless of which nodes are used to invoke them.

C.
The procedure requires that some commands be invoked on the node or nodes to be removed
and that some be invoked from all surviving cluster nodes.

D.
The procedure requires that some commands be invoked on the node or nodes to be removed
and that some be invoked from one surviving cluster node.

E.
Some commands require that the name of the node or nodes to be removed are passed as
arguments, and some commands require the name of existing nodes to be passed.

Explanation:
# crsctl delete node -n node_to_be_deleted
$ ./runInstaller -updateNodeList ORACLE_HOME=Grid_home “CLUSTER_NODES=
{node_to_be_deleted}” CRS=TRUE -silent -local
On any node other than the node you are deleting, run the following command from the
Grid_home /oui/bin directory where remaining_nodes_list is a comma-delimited list of the nodes
that are going to remain part of your cluster:
$ ./runInstaller -updateNodeList ORACLE_HOME=Grid_home “CLUSTER_NODES=
{remaining_nodes_list}” CRS=TRUE -silent
$ cluvfy stage -post nodedel -n node_list [-verbose]
Oracle Clusterware Administration and Deployment Guide