Which two actions are appropriate when a rolling upgrade procedure fails with an unexpected error?
A.
Factory reset both the controllers.
B.
Perform a series of takeovers and fallbacks until the cluster is operating normally.
C.
Contact the storage administrator support provider.
D.
Use the operating system shell to manually restart the upgrade.
E.
Retry the failed upgrade using the CLI or BUI in the event of a transient error.
F.
Conduct an initial reset on both controllers.
Explanation: