The correct answer is the following.
Political instability push Northern Europeans to migrate. Continuous internal conflicts in Northern European countries and lack of opportunities in those difficult times made Nothern Europeans migrate. There was also frequently political issues that made modifications to European countries borders. Late in the 19th century, most of the migration to the United States came from Germany and Ireland. Political issues and internal affairs in Germany mad many people leave in search of more stability and better chances to progress. Ireland faced economic issues and people from Scandinavian countries like Norwegians were part of the Northern European countries that decided to migrate to the Unie States.