You enabled the flashback logging feature， but you have not specified the location of the flash recovery area. Which location would be used as the default location for the flash recovery area？（）
- Athe location used for control files
- Bthe location used for redo log files
- Cthe location set by using $ORACLE_BASE
- Dthe location set by using $ORACLE_HOME
- Ethe location set by using CORE_DUMP_DEST
- Fthe location set by using BACKGROUND_DUMP_DEST