The correct answer is - natural selection.
This is a typical case of natural selection, where we have a group of people that have similar physical traits, that are selected and than isolated from any external influence, so with interbreeding they manage to keep their physical traits for generations to come and thus create a population that resembles their initial ancestors.
A) Hundred years war
B) Italian Wars
Italy was never a nation-state, therefore it turned into a power vacuum -The fall of Constantinople (this limited trade) -Failure of the Peace of Lodi -Sforza invited Charles VIII of France in to Italy to invade
True i think hopefully this is helpful
The anser is A hope this helped