You are managing a SharePoint farm in an Active Directory Domain Services (AD DS) forest. The forest contains two domains named americas.contoso.com and europe.contoso.com. A single SharePoint farm is located in the americas.contoso.com domain and uses Kerberos authentication. Users in the europe.contoso.com domain cannot access the Excel Services application in the americas.contoso.com domain when using an external data source. You need to ensure that users in the europe.contoso.com domain can use the Excel Services application with external data sources. What should you do?
A. Deploy a SharePoint farm in the europe.contoso.com domain.
B. Configure Kerberos constrained delegation.
C. Configure basic Kerberos delegation.
D. Configure anonymous access in the SharePoint farm.