The correct answer is C. 1916 AD.
The Battle of Verdun was a major battle in World War I that took place on the Western Front from February 21 to December 18, 1916. The battle was fought between the German and French armies, and it was one of the longest and bloodiest battles in history. The battle ended with a French victory, but it was a costly victory, with both sides suffering heavy casualties.
Romania declared war on Germany and its allies on August 27, 1916. Romania entered the war on the side of the Allies in the hope of regaining territory that had been lost to Austria-Hungary in the previous century. However, Romania’s entry into the war was a disaster for the country. The Romanian army was quickly defeated by the German and Austro-Hungarian armies, and Romania was forced to sign an armistice in May 1918.
The options A, B, and D are incorrect because they are not the years in which the Battle of Verdun and Romania’s declaration of war took place.