Your network contains two servers named Server1 and Server2 that run Windows Server 2008 R2.   Server1 has Active Directory Federation Services （AD FS） 2.0 installed.   Server1 is a member of an AD FS farm. The AD FS farm is configured to use a configuration database  that is stored on a separate Microsoft SQL Server.   You install AD FS 2.0 on Server2.   You need to add Server2 to the existing AD FS farm.   What should you do（）

• A、On Server1， run fsconfig.exe.
• B、On Server1， run fsconfigwizard.exe.
• C、On Server2， run fsconfig.exe.
• D、On Server2， run fsconfigwizard.exe.