Which Statement Best Describes the Growing Movement of Nationalism in Nineteenth-Century

Which statement best describes the growing movement of nationalism in nineteenth-century Europe?

A) It was resisted by liberals, who felt that all ethnic groups should live together harmoniously.
B) It advocated the formation of one European nation to end economic and military conflicts.
C) It was radical since it encouraged people to shift their political loyalty away from existing states and rulers.
D) It found its best expression in the writings of John Stuart Mill.
E) It declined after the Congress of Vienna.