The correct answer is Windows + R.

• Windows + R is the short-cut key to launch the RUN command window.
• Shortcut commands save time because it eliminates the need of using the mouse or tracker. 
• Ctrl+R- Align the text to the right.
• Alt + R- open the Review tab in the Office programs Ribbon.

• Shortcuts in MS Word- 

  Open a document.	Ctrl+O
  Create a new document.	Ctrl+N
  Save the document.	Ctrl+S
  Close the document.	Ctrl+W
  Cut the selected content to the Clipboard.	Ctrl+X
  Copy the selected content to the Clipboard.	Ctrl+C
  Paste the contents of the Clipboard.	Ctrl+V
  Select all document content.	Ctrl+A
  Apply bold formatting to the text.	Ctrl+B
  Apply italic formatting to text.	Ctrl+I
  Apply underline formatting to text.	Ctrl+U
  Decrease the font size by 1 point.	Ctrl+[
  Increase the font size by 1 point.	Ctrl+]
  Centre the text.	Ctrl+E
  Align the text to the left.	Ctrl+L
  Align the text to the right	Ctrl+R
  Cancel a command.	Esc
  Undo the previous action.	Ctrl+Z
  Redo the previous action, if possible.	Ctrl+Y
  Adjust the zoom magnification.	Alt+W, Q, then tab in Zoom dialogue box to the value you want.
  Split the document window.	Ctrl+Alt+S
  Remove the document window split.	Alt+Shift+C or Ctrl+Alt+S