Which keyboard shortcut would you use to open a document in Microsoft Word?

The keyboard shortcut to open a document in Microsoft Word is Ctrl+O. This command is specifically designed to prompt the user with the Open dialog box, allowing them to browse their file system and select the document they wish to open. Understanding this shortcut is crucial for efficiently navigating software, as it streamlines the process of locating and accessing files without the need to use the mouse.

The other shortcuts serve different functions: Ctrl+N creates a new document, Ctrl+S saves the current document, and Ctrl+P opens the print dialog. While each of these shortcuts is important for their respective actions in Word, only Ctrl+O is dedicated to opening existing documents, making it the correct choice in this instance.