You have installed two 64G flash devices to support the Database Smart Flash Cache feature on your database server that is running on Oracle Linux. You have set the DB_SMART_FLASH_FILE parameter: DB_FLASH_CACHE_FILE= ‘/dev/flash_device_1 ‘,’ /dev/flash_device_2’ How should the DB_FLASH_CACHE_SIZE be configured to use both devices?（）

• A、Set DB_FLASH_CACHE_SIZE=64G
• B、Set D3_FLASH_CACHE_SIZE=64G, 64G
• C、Set D3_FLASK_CACKE_SI2E=128G
• D、db_flash_cache_SI2E is automatically configured by the instance at startup