As the DBA， you run the following query on your ASM instance. What is the implication of the results of the query？（） SQL> select group_number， name， state from v$ASM_DISKGROUP；  GROUP_NUMBER NAME STATE  0 DGROUP1 DISMOUNTED  2 DGROUP2 MOUNTED  3 DGROUP3 MOUNTED  

• A、 The DGROUP1 disk group was unmounted by another DBA.
• B、 A datafile has been lost， causing the ASM disk group DGROUP1 to go into the DISMOUNTED state
• C、 One of the redundant disks （DGROUP1） has been lost in a disk group.
• D、 This query has no meaning in an ASM instance.
• E、 A disk associated with a disk group was discovered after the ASM instance initially opened.