单项选择题

A. Customize the node up event script to send an email to the operator.
B. Have HACMP send mail when the non-IP network fails by customizing the RG_MMOVE event script.
C. Change the network module to be slower so that a temporary failure of the non-IP network would not report an error.
D. Use snmp or clinfo to monitor the status of the non-IP network and dispatch some type of warning message.