Wow, I thought I made this one so easy, by adding option E - but hardly anyone got it right.  The correct answer is E.  In 1860, both Abe Lincoln and Stephen Douglas were from Illinois; in 1904, Teddy Roosevelt and Alton Parker were both from New York; in 1920, Harding and Cox were both from Ohio, and in 1944, FDR and Thomas Dewey were both from New York.  One footnote: after losing in 1920, Gov. James Cox went back to his newspaper business.  He eventually got into radio, then TV, and today his Cox Broadcasting owns KTVU-Channel 2 in Oakland!