Which menu should Robert select to add the Table of Contents to his ArcMap document?

To add the Table of Contents to an ArcMap document, selecting the Windows menu is the appropriate choice. The Table of Contents is considered a type of window within the ArcMap interface, and the Windows menu is specifically designed for managing various interface components such as this. When Robert navigates to the Windows menu, he will see options that allow him to show or hide different interface elements including the Table of Contents, which displays the layers in the map document. This function is crucial for managing the spatial data layers and provides an overview of the content being displayed, making it easier for users to interact with their GIS data.