You are developing a Windows Application.
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 2 actions should you perform?

A.
Modify the XML mapping file when the schema changes occur

B.
Modify the conceptual schema XML file when the schema changes occur

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

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