A developer is designing a multi-tier web application and discovers a need to hide the details of establishingand maintaining remote communications from the client. In addition， because the business and resourcetiers are distributed， the application needs to minimize the inter-tier network traffic related to servicing clientrequests. Which design patterns， working together， address these issues？（）

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