【单选题】
In your Automatic Storage Management （ASM） instance， one of the nonempty disk groups，DGROUP1， is no longer required and you want this disk group to be removed. You execute the following command to achieve this objective： <br /> DROP DISKGROUP dgroup1 EXCLUDING CONTENTS； <br /> What would be the result of this command？（） 
A、This command would result in an error because the disk group is not empty.
B、The command would drop the disk group， ignoring the EXCLUDING CONTENTS option.
C、The command would result in the disk group being marked as INVALID because it cannot be dropped.
D、The command would result in the contents being moved to the parent disk group and dropping of the disk group.
E、The command would distribute the contents of the specified disk group among all other disk groups and then drop the specified disk group.
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