Which two statement are true about enabling the write-b…

Which two statement are true about enabling the write-back flash cache?

A.
When enabling the write-back-flash-cache in a rolling manner dbcli should be used to inactivate the grid
disks on all cells first.

B.
Before write-back-flash-cache is enabled you need to drop the flash cache first.

C.
Write back flash cache requires a minimum required software version.

D.
When enabling write-back-flash-cache in a non-rolling manners it is important to ensure that
asmdeactivationoutcome is set to yes and asmmodestatus is set to online for all grid disks.

E.
flashcachemode should be set to write back by updating cellinit.ora and restarting cellsrv.