The correct option is C Blood and Iron policy
In 1862, Otto von Bismarck was appointed as Prussia's Prime Minister under King Wilhelm I and he devoted himself to the task of uniting the German states under Prussian leadership. He was known as the man of 'blood and iron' or 'Iron Chancellor' as he used methods of force. The policy of'blood and iron' meant a policy of war. The first aim he pursued was the elimination of Austria from the Germanic confederation.