Which statement is true regarding redundancy?

Which statement is true regarding redundancy?
A . System Administrators know when their cluster has failed over and can also see why it failed over by using the cphaprob Cf if command.
B. ClusterXL offers three different Load Sharing solutions: Unicast, Broadcast, and Multicast.
C. Machines in a ClusterXL High Availability configuration must be synchronized.
D. Both ClusterXL and VRRP are fully supported by Gaia and available to all Check Point appliances, open servers, and virtualized environments.

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Answer: D