Question

during the 1800s, the movement of large numbers of immigrants from many different countries into large american cities resulted in the rapid growth of effective public health programs. ethnic neighborhoods. public parks and recreation areas. plentiful and affordable public housing.

Explanation:

In the 1800s, immigrants often clustered in areas with others from their home country, forming ethnic neighborhoods as a way to maintain cultural ties and support one another. The other options do not align with the direct result of mass immigration to large U.S. cities in this era: public health programs, parks, and affordable public housing were not rapid, widespread outcomes of this immigration wave.

Answer:

B. ethnic neighborhoods.