What is the implication of the results of the query?(Choose two.)
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.
答案：（A、E）