What is the difference between deferred and concurrent firmware updates?

A.
Deferred firmware can be applied concurrently but contains updates that affect the internal
program load path, which are not activated until the next time the server is shut down and
restarted.

B.
Concurrent firmware must be done on all LPARs in the frame at the same time. Deferred
firmware can be loaded on each LPAR at a different time and only becomes active when the
LPAR is shutdown and restarted.

C.
Deferred firmware can only be applied during an outage to the managed system as it will
automatically shut the managed system down during its installation.

D.
Concurrent firmware is only for minor fixes to the system mircocode while deferred firmware
contains major fixes to the service processor.

Explanation: