Multiple choice The Zollverein describes a German states' customs union dominated by Prussia. the lower house of the Prussian parliament. Bismarck's liberal reform program. Prussian Black Shirts, who led the unification movement. Reveal answer Fill a bubble to check yourself A Correct answer Explanation The Zollverein was a customs union established in 1834 that eliminated internal tariffs among German states, significantly boosting Prussian economic influence and paving the way for political unification.