Why can setting too low a value for the FAST_START_MTTR_TARGET parameter reduce your overall database performance？（）

• A、Data blocks have to be written more frequently by DBWR. 
• B、Redo blocks have to be written more frequently by LGWR. 
• C、You need to substantially increase the size of your database buffer cache to hold the additional checkpoint records. 
• D、You need to substantially increase the size of your redo buffer cache to hold the additional checkpoint records.