You are designing an application by using Windows Presentation Foundation (WPF) and Microsoft NET Framework 4.
The user interface (UI) tier of the application will be implemented by using WPF. The middle tier of the application will be implemented by using Windows Communication Foundation (WCF).
The middle tier will contain several methods that update data in a remote database. The middle tier will also contain a long-running method named Process Data. The Process Data method performs database operations and can take several minutes to complete. You need to ensure that the UI of the application can continue to call other methods while the Process Data method is running
What should you do?

A.
Implement the Process Data method by using Windows Workflow Foundation (WF).

B.
Implement the Process Data method by using the Invoke method on the Dispatcher class.

C.
Call the Run method of the Dispatcher class before invoking the Process Data method

D.
Call the Do Events method of the Application class before invoking the Process Data method