During the 1860s otto von bismarck played a key role in the unification of germany, transforming it from several dozen independent kingdoms, duchies, and principalities into a unified nation. which statement best explains bismarck's methods for uniting the parts of germany

Otto von Bismark used wars and political instincts. He helped to bring about a rise in nationalistic pride. This brought the people to see themselves as Germans, not Bavarians, Berliners, Prussians, etc. He would later install puppet political leaders that he could easily manipulate to maintain control over the region. 

following type of cultural development caused people to want and buy new products on the market :

industrialization