單項(xiàng)選擇題

Consider the following scenario: 
You have a directory, data, under the disk group tdgroup 
A. You want to create an alias for one of the data files and you execute the following command:
ALTER DISKGROUP tdgroupA 
ADD ALIAS ’+tdgroupA/data/datafile.dbf’ 
FOR ’+tdgroupA. 231.45678’; 
Which task would be accomplished by the command?()

A.A
B.B
C.C
D.D
E.E

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