单项选择题

A.Only when the new master site already has existing re……

To increase the availability of an Advanced Replication environment， you can add a new master to a replication group without quiescing the group. This is achieved（）.

A.Only when the new master site already has existing replication groups.
B.By issuing a single command to create, populate, and activate the new master.
C.When the master definition site is not the same for all of the master groups.
D.Without impacting end users who are executing data manipulation language (DML) commands on the replicated tables.

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多项选择题WhichfouraretrueregardingtheWorkspaceManagerinOracle9i？（）

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B.Automatically installed with Oracle9i.
C.Merges changes with parent rows or discard changes.
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A.A
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C.C
D.D