Respuesta :
"Cavor" is the one among the following choices given in the question that took a diplomatic approach towards Italian unification. The correct option among all the options that are given in the question is the first option or option "A". I hope that this is the answer that has actually come to your great help.
I believe the answer is: A. cavour
Camillo Paolo Filippo Giulio Benso, who held the position as The count of Cavour was a leading figure who advocated for Italian unification. Because of this, after the declaration of the united kingdom of Italy, Cavour was given the position as the prime minister.