How did Zollverein and the creation of a network of railways help in strengthening the wider nationalist sentiments growing at the time?

How did Zollverein and the creation of a network of railways help in strengthening the wider nationalist sentiments growing at the time?
Answer: Zollverein abolished tariff barriers and reduced the number of currencies from over thirty to two. The creation of a network of railways further stimulated mobility, harnessing economic interests to nation unification. Thus, a wave of economic nationalism strengthened the wider nationalist sentiments growing at the time.