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