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？（）
- AFront Controller and Transfer Object
- BFront Controller and Service Locator
- CBusiness Delegate and Transfer Object
- DBusiness Delegate and Intercepting Filter