How are primary and secondary roles determined in a Cluster File System cluster?

How are primary and secondary roles determined in a Cluster File System cluster?
A . All cluster file systems are initially mounted on the same node which is designated as the primary; all other nodes are secondaries.
B . The first node where a cluster file system is mounted is designated as the primary for that file system; all other nodes are secondaries.
C . The Cluster Volume Manager master node is designated as the primary; all other nodes are secondaries.
D . The node with the lowest LLT ID is designated as the primary; all other nodes are secondaries.

Answer: B