What is the process used to restore an entire cluster in the event of a catastrophic failure?

A.
Restore the first node from tape or SFTP and then restore each subsequent node.

B.
Restore the first node and then perform a database push to the subsequent nodes in the cluster.

C.
Restore all the nodes in the cluster by means of a fresh install and then restore the features and subcomponents to each server by means of DRS.

D.
Restore the first node by doing a fresh install, restore the first node database from DRS, and then restore the subsequent nodes from the DRS backup location.