You are creating a Windows Workflow Foundation workflow by using Microsoft .NET Framework 3.5. The workflow host must receive data from workflow instances by using a communication service named CustomerDataExchange. You need to configure the workflow runtime services to enable communication between the host and the workflow instances. Which code segment should you use?

A.
WorkflowRuntime runtime = new WorkflowRuntime();CustomerDataExchange cde = new CustomerDataExchange();runtime.AddService(cde);

B.
WorkflowRuntime runtime = new WorkflowRuntime();CustomerDataExchange cde = new CustomerDataExchange();ExternalDataExchangeService dataService = new ExternalDataExchangeService();dataService.AddService(cde);

C.
WorkflowRuntime runtime = new WorkflowRuntime();ExternalDataExchangeService dataService = new ExternalDataExchangeService();CustomerDataExchange cde = new
CustomerDataExchange();dataService.AddService(cde);runtime.AddService(dataService);

D.
WorkflowRuntime runtime = new WorkflowRuntime();ExternalDataExchangeService dataService = new ExternalDataExchangeService();runtime.AddService(dataService);CustomerDataExchange cde = new CustomerDataExchange();dataService.AddService(cde);