Caroline Bartman knows her scientists. And her pop culture references. And her U.S. presidents. And her signs of the Zodiac. The DC resident and National Cathedral School senior proved her spanning knowledge of trivia Wednesday night, when she calmly slaughtered two other teen competitors during the Jeopardy Teen Tournament. Bartman barely showed her nerves during the television program (though perhaps it might have been because one of her competitors thought JFK voluntarily chose not…