The chronological order of the events is as follows:
1. The beginning of the Napoleonic wars (II) started in 1799.
2. The Proclamation of Victor Emmanuel II as the King of Italy (IV) took place in 1861.
3. The Treaty of Vienna (I) was signed in 1815, which concluded the Napoleonic wars.
Thus, the correct order is II, IV, and I.
Conclusion.
The correct answer is (D) II, IV, and I.