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QUESTION 1
You are the administrator of a SQL Server 2008 instance. 
All the instances run on their independent server. The three instances are respectively named InstanceA, InstanceB, and InstanceC. Between InstanceA and InstanceB, you configure a mirroring mission-critcal database. InstanceA currently acts as the Principal and InstanceC acts as the witness.
You intend to apply a patch to both servers as soon as possible, the patch needs to restart the server.
You must make sure that the database is online on the partner that currently does not apply the patch and during this time the database does not failover to the other partner.
Which action should you perform to achieve this goal?

A.    First, you should stop the mirroring session.
Second you apply the patch to the server that runs InstanceB.
Third, you should resume the mirroring session.
Fourth, you should manually failover the mirroring session.
At last, you should apply the patch to the server that runs Instance1.
B.    First, you should apply the patch to the server that runs InstanceB.
Second you apply the patch to the server that runs InstanceA.
C.    First, you should apply the patch to the server that runs InstanceB.
Second you failover the mirroring session manually.
At last apply the patch to the server that runs InstanceA
D.    First, you should remove the mirroring session.
Second you apply the patch to the server that runs InstanceB.
Third, you should apply the patch to the server that runs Instance1.
At last re-establish the mirroring session.