Where is the option to click on either? I've spent the last several minutes hunting for such an option but haven't found it. Facebook's own help page does not say that you can choose between them either. It offers only this:
"We've combined the Top News and Most Recent stories together in a single News Feed view.
If you see top stories first when you load your News Feed, simply scroll down to see the recent stories."
Any directions on how to get this clickable option you describe would be very helpful.