Which of the following actions will allow you to display a list of all sheets in an Excel workbook?

To display a list of all sheets in an Excel workbook, right-clicking on the sheet tab area and choosing "Unhide" is an effective approach. This option is particularly relevant when there are hidden sheets within the workbook. When you right-click on the sheet tab area, the "Unhide" option allows you to view a dialog box listing all currently hidden sheets. You can then select which ones you would like to make visible again.

The other actions presented do not accomplish the same result as effectively. For instance, pressing Ctrl + A selects all cells in a worksheet rather than providing visibility into the structure of the workbook itself. Navigating to the View tab does not offer an option labeled "Unhide Sheets"; instead, it typically provides "Unhide" but is not contextual for the entire workbook. The File menu also does not contain a function specifically called "Show All Sheets," making options A, C, and D less suitable for the task of listing all sheets within the workbook.