An administrator mistakenly shutdown production after a fallover because the service IP address  Was shifted from the normal production node to the standby node.  What can be done to avoid this type of mistake in the future？（）  

• A、 Include the service IP address in the administrator’s PS1 prompt
• B、 Alias the service IP address to the hostname in the /etc/host file
• C、 Define a persistent IP address with HACMP and make it a practice to use the persistent address for administration work
• D、 Add a DNS entry to map the standby node name to the service IP address so telnet connections will be to the correct node