单项选择题
A technician arrives in Germany and discovers that when their PC is plugged into the outlet, nopower is received. Which of the following actions should the technician take to get the PC tooperate?（）
A. Change the BIOS settings to the local time
B. Adjust the voltage selector switch
C. Attach a 220 volt power strip from the current region to the PC
D. Attach a 120 volt battery backup power supply to the PC
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