The correct answer is: D. command button
A command button is a control that, when clicked, executes an action or series of actions. It is a common control in many graphical user interfaces (GUIs). Command buttons are typically rectangular in shape and have a label that describes the action they perform. When a user clicks on a command button, the associated action is performed.
The other options are incorrect because:
- A combo box control is a control that allows the user to select from a list of items.
- AutoFormat is a feature that automatically formats a document according to a set of predefined rules.
- Conditional Format is a feature that allows the user to format cells in a spreadsheet based on certain conditions.