A developer is designing a multi-tier application and discovers a need to hide the details of establishing and maintaining remote communications from the client. In addition， the application needs to find， in a transparent manner， the heterogeneous business components used to service the client’s requests. Which design patterns， working together， address these issues？（）

• A、 Business Delegate and Transfer Object
• B、 Business Delegate and Service Locator
• C、 Front Controller and Business Delegate
• D、 Intercepting Filter and Transfer Object
• E、 Model-View-Controller and Intercepting Filter