Answer:
D. Realized it needed to build up its military
Step-by-step explanation:
The Crimean War was a conflict between 1853 and 1856 fought the Russian Empire against a league formed by the Ottoman Empire, France, the United Kingdom and the kingdom of Sardinia. It was unleashed by Russian expansionism and the fear that the Ottoman Empire would fall apart, and it was fought mainly in the Crimean peninsula, around the naval base of Sevastopol. It ended with the defeat of Russia, which was reflected in the Treaty of Paris of 1856.