Which setting enables the baselines by default in Oracle Database 11g?
A.
setting the STATISTICS_LEVEL parameter to TYPICAL
B.
adding filters to the Automatic Database Diagnostic Monitor (ADDM)
C.
enabling Automated Maintenance Task using Oracle Enterprise Manager
D.
setting the OPTIMIZER_USE_PENDING_STATISTICS parameter to TRUE
Gathering database statistics using the AWR is enabled by default and is controlled by the STATISTICS_LEVEL initialization parameter. The STATISTICS_LEVELparameter should be set to the TYPICAL or ALL to enable statistics gathering by the AWR. The default setting is TYPICAL. Setting STATISTICS_LEVEL to BASICdisables many Oracle Database features, including the AWR, and is not recommended. If STATISTICS_LEVEL is set to BASIC, you can still manually capture AWR statistics using the DBMS_WORKLOAD_REPOSITORY package. However, because in-memory collection of many system statistics—such as segments statistics and memory advisor information—will be disabled, the statistics captured in these snapshots may not be complete. For information about the STATISTICS_LEVELinitialization parameter