Final answer:
Count Camillo di Cavour contributed to Italian unification by supporting France in the Crimean War, industrializing the nation, and drawing Austria into war with Sardinia, which makes (d) All of the choices are correct the correct answer.
Step-by-step explanation:
Count Camillo di Cavour played a pivotal role in the unification of Italy. He was appointed Prime Minister in 1852 and set forth on a strategic plan to unite Italy. One of his earliest contributions was supporting France in the Crimean War, which led to a strategic alliance with the French emperor, Napoleon III.
Subsequently, Cavour focused efforts on industrializing the northern part of Italy, which was essential for the political and economic cohesion of the region. By industrializing the north, Cavour helped to modernize the infrastructure and strengthen the economy, which prepared the area for unification.
Additionally, Cavour skillfully drew Austria into war with Sardinia by provoking them with the support of France. This led to the Austrians losing Lombardy, and further increased the influence of Cavour's Piedmont-Sardinia. Small northern Italian states followed by overthrowing their governments and joining with Piedmont. Eventually, Cavour's actions would bring about the formation of the Kingdom of Italy, with Victor Emmanuel II as its king.
So, Count Camillo di Cavour contributed to the unification of Italy by supporting France in the Crimean War, industrializing the nation, and drawing Austria into war with Sardinia - making the correct answer (d) All of the choices are correct.