After a power failure, you noticed that one of your cluster database instances did not start automatically, whereas all other instances came up successfully.
What would you do to determine the precise cause for the instance startup failure? (Choose three.)
A.
Check the resource state by using the CRS_STAT command.
B.
Check for OCR corruptions by using the OCRCHECK command.
C.
Check the alert.log file that belongs to the instance that did not start.
D.
Check the alert.log file that belongs to the Oracle Clusterware software.
E.
Check if the Oracle Clusterware is functional by using the CRSCTL command.
F.
Reboot the node where the failing instance resides to check if the problem is persistent.
G.
Enable extra debugging in the Oracle Clusterware software by using the CRSCTL command.