The correct answer is it helped German leaders to unify communities across the country.
The spread of Nationalism impacted Germany during the 18th century in that it helped German leaders to unify communities across the country.
German Nationalism in the 18th century instilled a sense of pride on German people that helped to promote a sense of solidarity that created a national identity with the aim of form a nation-state. This goal was accomplished because Nationalism helped German leaders to unify communities across the country. Pan-Germanism was a movement that wanted to unify all German-speaking people.