You are an enterprise application developer. You are designing a monitoring mechanism for a Web service. The Web service uses a custom header for authentication. You must send an e- mail message to the server administrators whenever the number of consecutive failed authentication attempts reaches three. You need to design the monitoring mechanism by using the minimum amount of development effort.
What should you do?

A.
Create a performance counter to monitor failed logon attempts.Write a code segment to send an e-mail message whenever the value of the counter is 3.

B.
Create a performance counter to monitor failed logon attempts. Create an alert in the System Monitor to send an e-mail message whenever the value of the counter is 3.

C.
Use an existing counter to monitor failed logon attempts.Write a code segment to read the counter and to send an e-mail message whenever the value of the counter is 3.

D.
Use an existing counter to monitor failed logon attempts.Create an alert in the System Monitor to send an e-mail message whenever the value of the counter is 3.