Although faced with communist resistances, Mussolini never faced it as a real political threat.
At the time of ww2, Mussolini already had control of Italy as a fascist dictator and the support of the public, so he did not need to gain their acknowledgments.
If Germany and Italy had won the war, mussolini could take control of the entirety of Europe.
So the correct answer would be that hitler called on mussolini for assistance, offering to share power in Europe.
Hope this helps!
