In what way did the physical geography of northern Europe affect the ethnic diversity of the region? A) A lack of significant physical barriers allowed for easy migration to the area.
B) Extremely cold climate conditions made it difficult to live in the region.
C) Vast waterways across the plains blocked the flow of migrants.
D) Multiple mountain ranges acted as a barrier to cultural convergence.

B) Extremely cold climate conditions made it difficult to live in the region

Explanation: In places where there are countless mountain ranges, there is bound to be isolation to the point where the people that already reside there would develop their own language, culture, and mannerisms. Northern Europe is filled with mountains and cold climate. Many people from other regions in Europe would have a hard time adjusting to the harsh conditions like the natives.