How Did the Franco-Prussian War Encourage the Growth of French

How did the Franco-Prussian War encourage the growth of French nationalism in the late nineteenth century?

A) It encouraged the French to unify around their antipathy toward the Germans.
B) It encouraged the French to end class struggles.
C) It encouraged the French to support and promote their national literature and language.
D) It encouraged the argument that national identity was more important than class identity for the French.