A developer used wsimport to generate the skeleton code for a Web service implementation. What is the purpose of the generated ObjectFactory class？（） 

• A、 The ObjectFactory class is the generated Service Endpoint Interface class
• B、 The ObjectFactory class is the generated service provider class that is used by the JAX-WS client.
• C、 The ObjectFactory class takes the targetNamespace value and creates the directory structure.
• D、 The ObjectFactory class allows you to programatically construct new instances of the Java representation for XML content.