In UiPath best practices, to ensure that an action is executed regardless of any exceptions, you should place such steps in the "Finally" block of the Try Catch activity. The "Finally" block is designed to run after the "Try" and any "Catch" blocks have completed, whether an exception was thrown or not. This ensures that step 4 (closing the web browser) is executed even if exceptions occur in steps 2 (data scraping) or 3 (storing data in Microsoft Excel). Therefore, the correct answer is C.