You notice that the performance of the database has degraded because of frequent checkpoints. Which two actions resolve the issue（）

• A、Disable automatic checkpoint tuning.
• B、Check the size of the redo log file size and increase the size if it is small.
• C、Set the FAST_START_MTTR_TARGET parameter as per the advice given by the MTTR Advisor. 
• D、Decrease the number of redo log members if there are more than one redo log members available in each redo log group.