How can I modify the registry to enable the option to show file extensions in Windows Explorer?

A. To enable the option to show known file extensions, perform these steps:

1. Start the registry editor (regedit.exe).
2. Navigate to the HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced registry subkey.
3. Double-click HideFileExt and set it to 0 to show known file extensions or 1 to hide them.
4. Click OK.
5. Close the registry editor.