The problems between different cultural groups were caused by: C. a wave of immigrants moving to the cities of the northeast.
<u>Explanation:</u>
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.
The first answer is correct
The appropriate answer is B. steam boats could travel against the current on a river. This statement means that steam boats could travel upstream. The steam engine in steam boats allowed them to travel upstream possibly against a strong current. Sail boats rely on wind or the downstream flow of the water to move it from one location to the other. The invention of the steamboat revolutionised transportation of goods and people on large navigable rivers.