What is the shortcut to zoom the artboard to fit within the window?

The shortcut to zoom the artboard to fit within the window is found in the option related to the View menu, specifically "View> Zoom to Fit." This command allows users to quickly adjust their view to see the entire artboard within the current window size, making it easier to work with large designs or when needing to assess the overall composition.

The reason this is the most appropriate choice is that it directly addresses the need to fit the artboard to the viewable area. It provides a quick way for artists and designers to ensure that all elements on the artboard are visible and helps in managing the workspace effectively.

The other options may contain instructions pertaining to zoom functions, but they do not specifically direct the action of fitting the artboard to the window. This emphasizes the importance of knowing the specific commands available in Illustrator for effective navigation and functionality.