A bank runs 50 workstations and would like to decrease its electricity costs， while not sacrificing functionality. All of the workstations are high-end performance units that are intended to be used for CAD-like applications. Analysts benefit from the added performance， but tellers and associates could use more minimalist systems. Which of the following methods would decrease the banks electricity and hardware costs？（）

• A、Swap all teller and associate machines with servers.
• B、Swap all teller and associate machines with thin clients.
• C、Swap all teller and associate machines with low-profile high-end workstations.
• D、Swap all teller and associate machines with laptops.