Step 1: Recall Italian unification.
The unification of Italy (Risorgimento) was not the work of a single leader but a combined effort of several patriots.
Step 2: Key figures.
- Mazzini: Ideological leader, founder of Young Italy, inspired nationalism.
- Cavour: Prime Minister of Sardinia-Piedmont, diplomatic strategist.
- Garibaldi: Military hero, led the “Expedition of the Thousand” with his Redshirts.
Step 3: Evaluate options.
Each played an essential role; hence, the unification was a collective achievement.
Step 4: Conclusion.
The correct answer is (D) All of them.