Which of the following would be the BEST approach to keep a single controller storage subsystem on a single fabric from being a single point of failure?

Implementing dual controllers in a storage subsystem provides redundancy by having two controllers actively manage or stand by to take over storage operations. If one controller fails, the other can seamlessly take over, ensuring continuous availability of the storage and eliminating the controller itself as a single point of failure.

Multi-pathing provides redundant paths to storage but does not eliminate the single controller as a single point of failure if there's only one active controller.

Dual core switches provide redundancy in the network or SAN fabric, but they do not address the single controller issue within the storage subsystem itself.

Redundant fabrics provide multiple network paths to the storage, which enhances connectivity resilience but does not remove the single storage controller as a single point of failure.