You are designing an ASP.NET Web Forms application. The application supports
thousands of concurrent users. A Web form in the application enables users to send
personalized email messages to thousands of recipients. You need to design the application
to optimize performance. Which approach should you recommend?

A.
Use the classes in the System.Net.Mail namespace from the On Click method of the
form.

B.
Use a separate process from the On Click method of the form.

C.
Use a Background Worker class from the On Click method of the form.

D.
Use the classes in the System.Web.Mail namespace from the On Click method of the
form.

Explanation: