An organization wants to split their Cisco ISE deployment to separate the device administration functionalities from the main deployment. For this to work, the ...

An organization wants to split their Cisco ISE deployment to separate the device administration functionalities from the main deployment. For this to work, the administrator must deregister any nodes that will become a part of the new deployment, but the button for this option is grayed out.Which configuration is causing this behavior?

A. All of the nodes are actively being synched. B. All of the nodes participate in the PAN auto failover. C. One of the nodes is an active PSN. D. One of the nodes is the Primary PAN.