A storage network engineer is upgrading a Cisco MDS Director with dual supervisor modules. The install command is executed on the standby supervisor module but fails. Which action would have prevented this failure?
A. All FCoE interfaces configured on the MDS must be shut down before starting the upgrade.
B. The upgrade must be done on the active supervisor module only.
C. Cisco Fabric Services must be disabled before starting the upgrade.
D. Fabric Controller Service must be stopped before starting the upgrade.
