[单选题]Windows XP中，（）可打开“关闭Windows”对话框。

A、右键单击“开始”按钮
B、单击“开始”按钮，选择“关闭系统”命令
C、任何时候同时按下Alt+F4组合功能键
D、同时按下Ctrl+F4组合功能键

参考答案： C

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