The correct option is C He made a secret pact with the French and provoked Austria, who were defeated by the combined forces of France and Sardinia.
Camillo, the Count of Cavour, made a secret pact with the French and provoked Austria. Austria readily entered the war and was defeated by the combined forces of France and Sardinia. He merged Lombardy and Sardinia with Italy. Tuscany, Modena, Parma and the Papal states chose to be annexed to Sardinia.