Câu 19: MS-600: Building Applications and Solutions with Microsoft 365 Core Services

You are developing a new Microsoft Office Add-in to integrate a corporate invoicing system and Microsoft Excel. You need to add a new button to the Office ribbon. What should you add to the add-in?

1. A. a task pane
2. B. a dialog
3. C. a custom function
4. D. a command — đáp án hiện tại