Which two statements explain the reason for the nonexecution of the dbshut script?

You have created the dbora script for automating the database startup and shutdown processes and associated the script with the run levels. The dbshut script is associated with runlevel 6.
However, when you shut down the operating system (OS) the dbshut script does not run.
Which two statements explain the reason for the nonexecution of the dbshut script? (Choose two.)

A.
The dbora lock file must be referenced in the dbshut script.

B.
The dbora script file must contain a reference to the dbora lock file.

C.
The dbora lock file is not found in the /var/lock/subsys/ directory.

D.
The dbora script file entry in runlevel 6 must be linked to the dbora script.