单项选择题

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.

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