You create a Windows Workflow Foundation application by using Microsoft .NET Framework 3.5. The application uses a sequential workflow.

You plan to add a workflow to the application.

You need to ensure that the workflow performs the following tasks:

It listens for an event raised by the host application.
It waits only for 30 minutes for the event to be raised.

What should you do?

A.
Add the following activities in an EventHandlingScopeActivity activity:
A DelayActivity activity that has a delay of 30 minutes
A HandleExternalEventActivity activity

B.
Add a DelayActivity activity that has a delay of 30 minutes before a HandleExternalEventActivity activity.

C.
Add a ParallelActivity activity to the workflow. Add a HandleExternalEventActivity activity to one branch of the ParallelActivity activity. Add a DelayActivity activity that has a delay of 30 minutes to the other branch.

D.
Add a ListenActivity activity to the workflow. Add a HandleExternalEventActivity activity to one branch of the ListenActivity activity. Add a DelayActivity activity that has a delay of 30 minutes to the other branch.