You work as a database administrator for Supportcenter.cn. You have set the retention period for Automatic Repository （AWR） statistics to four days and collection interval to 15 minutes. You want to view the statistics collected and stored in AWR snapshot. Which two methods would you use to view the AWR statistics？（）
- Ause enterprise manager
- Buse DBMS_SQL package
- Cuse DBMS_AWR package
- Duse PRVT_WORKLOAD package
- Equery the AWR snapshot repository objects
- Fuse DBMS_WORKLOAD_REPOSITORY package