A company is trying to integrate managements new green IT policy onto a single server system. While the server does not host any applications that need to run continuously, the unit does need to be accessible to all users for file retrieval. Which of the following would be the MOST cost- effective method to establish a green power policy for the machine?

A.
EnableSpeedStep technology and hard disk power down for periods of low system utilization.

B.
Install a smaller, lightweight server that runs continuously with a mirror image of the files found on the larger system. Have the larger server auto shutdown after 30 minutes of inactivity.

C.
Turn on Wake on LAN technology that would awaken the system for access requests.

D.
Remove the current server and replace with a NAS device that is set to sleep after an hour of inactivity.