Which statement about Wilhelm I is true? A. He was the grandson of Tsar Alexander I who abolished serfdom in Russia. B. He was the king of Bavaria who peacefully annexed Alsace and Lorraine from France. C. He was a Prussian chancellor who played a major role in the unification of Germany. D. He was the king of Prussia who became kaiser of a united Germany.
The answer is D, Kaiser Wilhelm was the last German Emperor (Kaiser) and King of Prussia, ruling the German Empire and the Kingdom of Prussia from 15 June 1888 to 9 November 1918.