Which tasks do you perform to recover the complete system?

Due to a hardware failure of your persistence area, your SAP HANA database needs to be restored.

Which tasks do you perform to recover the complete system? Note: There are 2 correct answers.
A . Start the recovery from the tenant database using SAP HANA cockpit 2.0
B . Recover all the databases using Initialize Log Area option
C . Recover the system database before recovering all tenant databases
D . Start the recovery from the system database SAP HANA cockpit 2.0

Answer: C,D