An administrator was unable to contact NodeB, and on further investigation he found that the node
was not active. The other cluster node (NodeA) is active. After restarting the node, the following
entries are found in errpt:

What caused NodeB to halt?

A.
gsclvmd was killed on NodeB

B.
clstrmgrES was killed on NodeB

C.
Group Services domain became partitioned, then dissolved on reactivation

D.
diskhb_vg was forced offline which caused a diskhb network failure and the cluster was
partitioned