Answer: A) to increase the power of Prussia.
Step-by-step explanation:
Otto von Bismarck was Minster President and Minister of Foreign Affairs for the Kingdom of Prussia. He used Realpolitik (reality politics) methods to increase Prussian power and align other German states together with Prussia into the German Empire. (He then became Chancellor of the German Empire.) He helped create wars with neighboring countries to increase national pride among the German people. The main wars that Bismarck provoked in order to rally German territories together behind Prussian leadership were the Austro-Prussian War (1866) and the Franco-Prussian War (1870-71).