You are creating a business component by using Microsoft Visual Studio .NET 2008 and the .NET Framework 3.5.
The component manages the interest rates on new loans. You need to ensure that all online applications that access the component are notified
of the changes as soon as they occur. You need to achieve this goal by using the minimum amount of network bandwidth.
What should you do?

A.
Create a serviced component.
Use loosely coupled events to send notifications to the applications about the changes made.

B.
Create a serviced component.
Expose a method that will be called by the applications to verify whether the interest rates have changed.

C.
Create a Windows Communication Foundation (WCF) service.
Write a code segment that alerts all users of the application by using e-mail when the changes are made.

D.
Create a Windows Communication Foundation (WCF) service.
Expose a method that will be called by the applications to verify whether the interest rates have changed.