You are an administrator for Certkiller .com. Certkiller .com wants you to execute an upgrade of their ControlCenter Clustered infrastructure. Which of the following is vital to this upgrade?
A.
The upgrade takes place only on the active cluster node.
B.
The upgrade takes place while both nodes of the cluster are running
C.
The upgrade takes place on the node where ControlCenter was first installed.
D.
The upgrade takes place while only one node of the cluster is running