Answer:
C. Germans
Explanation:
Germans began to migrate to US in 17th century and continued till 19th century. In the 18th century the economic problems acted as a push factor and Germans came from the states of Wuerttemnerg, Baden and Hesse, Mainz and Muenster.
In 1850's almost one million Germans migrated to US. The newcomers joined the established settlers. Today, almost 58 million Americans are of German ancestry. Germans are found in California, Ohio, Pennsylvania, Illinois and Texas. Minnesota, Wisconsin, South Dakota , North Dakota, Iowa and Nebraska are the states with most dense German-American population.