Which of the following is necessary to ensure power redundancy in a FC SAN?

Multiple HBAs provide path redundancy from servers to storage, not power redundancy for the SAN infrastructure itself.

Adequate division of circuits means providing separate and independent power sources and distribution paths to critical SAN components like FC switches and storage arrays, preventing a single power failure from disrupting the entire fabric.

Replication provides data redundancy and disaster recovery capabilities, but does not address the physical power supply redundancy of SAN components.

Multiple FC switches provide fabric redundancy and load balancing within the SAN, but they still require independent and redundant power sources to ensure continuous operation.