Your network contains an Active Directory domain named contoso.com. The domain contains a   server named Server1. The Active Directory Federation Services （AD FS） role is installed on Server1. Contoso.com is defined as an account store.   A partner company has a Web-based application that uses AD FS authentication. The partner company  plans to provide users from contoso.com access to the Web application.   You need to configure AD FS on contoso.com to allow contoso.com users to be authenticated by the   partner company.   What should you create on Server1（）

A、a new application

B、a resource partner

C、an account partner

D、an organization claim