How did the Franco-Prussian War of 1870-1871 contribute to German unification?

German victory in the war increased nationalism and patriotism in Germany
French victory in the war united the Germans against a common enemy
The war resulted in Wihelm l becoming King of Prussia
The war showed that only military force could unite Germany

Question

How did the Franco-Prussian War of 1870-1871 contribute to German unification?

German victory in the war increased nationalism and patriotism in Germany
French victory in the war united the Germans against a common enemy
The war resulted in Wihelm l becoming King of Prussia
The war showed that only military force could unite Germany

wwhitlock · Answer

Germany beat France and add the province of Alsace and part of Loraine to the new unified Germany. In a unified Germany there would not be a king of a province like Prussia. The military force used was against France, not against other German provinces.

lovepig · Answer

So A?