How should the D3_flash_cache_size be configured to use both devices?

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/f lash_device_1‘,‘ /dev/f
lash_device_2‘ How should the D3_flash_cache_size be configured to use both devices?

A.
Set D3_FLASH_CACHE_SIZE=64G, 64G.

B.
Set D3_FLASK_CACKE_SI2E=i28G.

C.
Set DB_FLASH_CACHE_SIZE=64G.

D.
db_flash_cache_SI2E is automatically configured by the instance at startup.