Which two are prerequisites for running the I/O calibration tool? (Choose two.)
A.
The database must be in MOUNT state.
B.
The database should be opened in restricted mode.
C.
For determining latency time, the STATISTICS_LEVEL parameter must be set to TYPICAL or ALL.
D.
The disks to be tested must be configured to use asynchronous I/O for data files.
E.
The database instance must be started using an SPFILE.