数据库是归档模式的时候，当你需要配置一个闪回区，下面哪几个选项是你要考虑的

A. Setting the FAST_START_MTTR_TARGET to set the mean time to recover

B. Setting the RECOVERY_PARALLELISM parameter to twice the number of CPUs

C. Using the DB_RECOVERY_FILE_DEST parameter to set the location for flash recovery area（设置DB_RECOVER_FILE_DEST参数来确定闪回区的位置）

D. Using the DB_RECOVERY_FILE_DEST_SIZE parameter to define the disk space limit for the recovery files created in the flash recovery area（设置DB_RECOVERY_FILE_DEST_SIZE来设置闪回区的创建的恢复文件的大小）

Answer: CD