Multiple choice Otto von Bismarck, the Prussian-born leader of German unification, instituted the Zollverein, the German customs union. followed a rigid plan for national unification. was a liberal from lower class origins. practiced Realpolitik in conducting domestic/foreign policy. Reveal answer Fill a bubble to check yourself D Correct answer Explanation Realpolitik is the term used to describe Bismarck's pragmatic, power-focused approach to politics, where he prioritized state interests over ideology.