Which four statements are true about database instance behavior? (Choose four.)
A. An idle instance is created when a STARTUP NOMOUNT is successful
B. All dynamic performance views (v$ views) return data when queried from a session connected to an instance in NOMOUNT state
C. The consistency of redo logs and data files is checked when mounting the database
D. Redo log files can be renamed in MOUNT state
E. An SPFILE can be updated when connected to an idle instance
F. Datafiles can be renamed in MOUNT state
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ADEF is correct
Not B: Dynamic perdormance views that are populated from the control file, such as V$DATABASE, can be queried only when the database has been mounted, which is when the control file is read
Not C: the consistency of data file is checked when opening the database
ABDF is correct
I thought ABDF is correct