单项选择题

Consider the following configuration： devices diskP1 is……

Consider the following configuration：
/devices/diskP1 is a member of disk group grp1.
/devices/diskP2 is a member of disk group grp1.
/devices/diskP3 is a member of disk group grp1.
/devices/diskP4 is a candidate disk.
/devices/diskQ1 is a member of disk group grp2.
/devices/diskQ2 is a member of disk group grp2.
/devices/diskQ3 is a member of disk group grp2.
/devices/diskQ4 is a candidate disk.
Which command will add the disk /devices/diskP4 to the disk group， grp1？（）

A. ALTER DISKGROUP grp1 ADD DISK ’/devices/diskP1’， ADD DISK ’/devices/diskP4’；
B. ALTER DISKGROUP grp1 ADD DISK ’/devices/disk*4’；
C. ALTER DISKGROUP grp1 ADD DISK ’/devices/diskP*’；
D. ALTER DISKGROUP grp1 ADD DISK ’/devices/diskQ*’， ADD DISK ’/devices/diskP*’；

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