Which approach should you recommend?

Your company uses a third-party service to host its SharePoint 2010 site. The hosting service requires all sites to
be sandboxed and uses forms-based authentication (FBA). You are asked to integrate the customer relationship
management (CRM) data that is stored within your companys domain into the SharePoint site. The CRM data is
trimmed based on the user token and is made accessible via Web services. You need to display the CRM data in
the correct way for each user token.
Which approach should you recommend?

A.
Connect to the CRM system using Business Connectivity Services (BCS) with Windows Credentials set as the authentication mode.
Use the Secure Store Service to map FBA credentials to domain credentials.

B.
Connect to the CRM system using BCS with Pass-Through set as the authentication mode.
Use the Secure Store Service to map FBA credentials to domain credentials.

C.
Connect to the CRM system using BCS with RevertToSelf set as the authentication mode.
Use the Secure Store Service to map FBA credentials to domain credentials.

D.
Prompt users for their domain credentials and make a call to the web services using these domain credentials.