Arrange the events in chronological order.
the Enlightenment
formation of the kingdom of Italy
sweep of revolutions across Europe
Metternich's initiatives to curb nationalism

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The Enlightenment was a cultural and intellectual movement, primarily European, that was born in the mid-eighteenth century and lasted until the early years of the nineteenth century.

• Mettinics innovation to curb nationalism 1799

• sweep of revolution across Europe 1848: The revolutions of 1848 were characterized by the importance of nationalist demonstrations and the beginning of the first organized demonstrations of the workers' movement.

• Formation of kingdom of Italy 1861: The Kingdom of Italy (in Italian: "Regno d'Italia") was the name assumed on March 17, 1861 by the state emerged after the Italian national unification (1848-1870) led by Victor Manuel II who was crowned King of Italy in 1861.

the answer is a. hope this