The answer is letter A.
This revolution began and lasted for 65 years. Otto von Bismarck and the Prussian army defeated the Second Empire of Louis Napoleon in France which forced the French to elect government representatives by voting. During this revolution, there were only two parties that dominated the government and these were the monarchist, advocates of the monarchy, and the republicans, people who wanted a government based on a constitution and elections. As a result, an long conflict followed afterwards when the monarchs eventually got most of their roles in the government.