Your network contains an Active Directory domain named contoso.com. The domain contains a server named Server1. Server1 has the Active Directory Federation Services （AD FS） role installed.   You have an application named App1 that is configured to use Server1 for AD FS authentication. You deploy a new server named Server2. Server2 is configured as an AD FS 2.0 server.  You need to ensure that App1 can use Server2 for authentication.   What should you do on Server2（）

• A、Add an attribute store.
• B、Create a relying party trust.
• C、Create a claims provider trust.
• D、Create a relaying provider trust.