A tab on my computer screen has disappeared. What did I do?

When I go to the tools/ Internet options/ general page and look at my Temporary Internet Files section in the middle of the page, I used to have a Delete Cookies button on the far left side of it. (right next to the delete files button). Somehow I did something stupid and made it disappear and now I can’t bring it back. What did I do to cause this and how can I bring it back? :smack:

WAG: You already deleted all your cookies, and have them turned off, so there’s nothing to delete.

If I’m right, you should activate cookies again, go to a site that you know uses them, then the tab should come back.

I’m probably wrong, though.