What must a public official prove to win a libel lawsuit?

Nothing, because a public official cannot sue the media for libel.

That the media published personal information that, while true, harmed the person's reputation.

That the media published a false statement as if it were fact, and that it simply did not check well enough to make sure the statement was accurate.

That the media published a false statement as if it were fact, and that it did so with malicious intent