Task: Text Completion
Input (English): [header] How to connect a logitech wireless mouse on pc or mac [title] Turn on the logitech mouse. [step] The on/off switch is located on the bottom of the mouse. [title] Plug in the wireless receiver. <sep> (A) [step] This switch is located on the top left corner of the device. [substeps] The start menu above the settings window will appear. (B) [step] The switch should automatically turn on on. [title] Make sure that you have changed the message field. (C) [step] The wireless receiver is a small usb device that you can plug into any open usb port on your pc or mac. [substeps] On a desktop computer the usb ports are usually on the back of the computer tower, while on a laptop computer the usb ports are usually on the sides. (D) [step] Once connected, you can tap the radio button on the back of the wireless receiver. [title] Scroll down and tap " wi-fi " (the blue button located at the bottom of the language window).
Output (English): C