You are an enterprise application developer. You review the design of a component. The component processes billing for an online store application. The application is developed by using ASP.NET 2.0. The component must be highly available during business hours. You need to ensure that the component meets the following requirements: It reads all orders that must be billed. It sends an e-mail notification to the users.It receives confirmation for credit card and bank account transactions.
What should you do?

A.
Develop the component as a Web service. Deploy the Web service on a Web farm.

B.
Develop the component as a Windows service.Deploy the serviced component on a multiprocessor server.

C.
Develop the component as a Windows application. Deploy the Windows application on a multiprocessor server.

D.
Develop the component as a serviced component.Deploy the serviced component on a Web farm that uses Network Load Balancing.