You create a Windows Workflow Foundation application by using Microsoft .NET Framework 3.5.
You plan to call a method in the workflow host to send messages.

You write the following code segment.

public interface IOrderCommunication {
void UpdateOrder(string orderId);
}

You need to decorate the interface.

Which line of code should you use?

A.
[LocalizableAttribute(true)]

B.
[ExternalDataExchangeAttribute]

C.
[CorrelationParameterAttribute("orderId")]

D.
[ActivityCodeGeneratorAttribute("orderId")]