You are developing a Windows application by using Microsoft .NET Framework 4, Microsoft
Visual Studio 2010, and Microsoft SQL Server 2008. New features that require changes to
be made to the database schema are added to the application every week. You need to
ensure that the changes made to the database schema do not require the application to be
recompiled. Which two actions should you perform? (Each correct answer presents part of
the solution. Choose two.)

A.
Modify the conceptual schema xml file when the schema changes occur.

B.
Build a storage model and use it to access data from the business entities.

C.
Build a conceptual model and use it to access data from the business entities.

D.
Modify the xml mapping file when the schema changes occur.