Which two statements about parallel recovery in a RAC environment are true? (Choose two.)
A.
The RECOVERY_PARALLELISM initialization parameter specifies the number of redo application server processes participating in instance or media recovery.
B.
The use of the RECOVERY_PARALLELISM initialization parameter is the only way to initiate parallel recovery.
C.
The RECOVERY_PARALLELISM initialization parameter causes serial recovery if the value is greater than two.
D.
Parallel recovery is most effective at reducing recovery time while concurrently recovering several data files on several disks.