Minimize all of the windows
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Windows Logo+D
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Windows Logo+M
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Windows Logo +U
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Windows Logo+E
B
Correct answer
Explanation
Windows Logo+M is the keyboard shortcut to minimize all open windows and show the desktop. Windows Logo+D also shows the desktop but works differently (it toggles). Windows Logo+E opens Windows Explorer, and Windows Logo+U opens the Utility Manager. Logo+M is specifically for minimizing all windows.