Which two statements are true regarding an Automatic Storage Management (ASM) instance? （）

• A、As ASM instance mounts an ASM control file
• B、An ASM instance uses the ASMB process for rebalancing of disks within a disk group
• C、Automatic Memory Management is enabled in an ASM instance even when the MEMORY_TARGET parameter is not set explicitly
• D、An RDBMS instance gets connected to an ASM instance using ASMB as a foreground process when the database instance is started