Which of these caused problems between different cultural groups in
Northern cities after 1850?
O
A. A large migration of free African Americans to the North
O
B. Differences between the descendants of Dutch and English
settlers
O
C. A wave of immigrants moving to the cities of the Northeast
O
D. Territory fights along the Canadian border

The problems between different cultural groups were caused by: C. a wave of immigrants moving to the cities of the northeast.

Explanation:

A cultural group is defined as a group of people who follows same beliefs, patterns of behavior, and values. The cultural group is identified by their behavior and way of thinking.

During 1850, the Northern cities have different cultural group. There were many conflicts between the cultural groups. This is was due to immigrants moving to the cities of the northeast.

Immigrants are people who move from their own country and settle down in another country.

"they had a large area of land that they owned."