Which three are true about Automatic Workload Repository (AWR)? (Choose three.) 

Answer options:

A. By default, AWR snapshots are taken every 60 minutes.
B. Its collection level is determined by the value of the STATISTICS_LEVEL database parameter.
C. By default, AWR snapshots are retained for 7 days.
D. The taking of AWR snapshots can be disabled.
E. AWR data is stored in the SYSTEM tablespace.

ABD

Reference: https://docs.oracle.com/cd/B28359_01/server.111/b28320/initparams240.htm#REFRN10214