A is correct. I would not say "countries" but "regimes" were not able to fully accept idea of human rights. after the WW I there was an ideological conflict which did not follow intellectual or rational channel but became rapidly manifested by means of weapons. First this conflict appeared within states themselves 1) Spain (conservatives vs liberals/communists/republicans) and similarly Portugal in both countries liberal republics were not very successful, 2) Germany (Weimar Republic went into being but had many ennemies), 3) Italy, 4) central-european elites felt humiliated by the Versailles treaty (Hungary and Austria). In all these cases old elites wanted to keep their privileged positions and preferred some sort of dictatureships.
there are to dog by a tree
the answer is d. party organizers, volunteers, voters and elected officials.