The opening of emigration to the U.S. from other parts of the world created a need for what?

The correct response highlights the significance of establishing Mother Houses in the context of increased emigration to the United States. As immigrants arrived in large numbers, often seeking refuge or better opportunities, there was a growing need for organized support systems that could assist these new arrivals. Mother Houses, which served as central locations for various religious orders, were crucial in providing necessary services such as education, shelter, and community support specifically geared towards immigrants. These institutions played a vital role in helping integrate diverse populations into American society.

Additionally, while other options may have some relevance to the broader context of emigration, they do not address the specific organizational and supportive needs that emerged from this influx of people. Large eastern cities, for example, became destinations for many immigrants, but the establishment of Mother Houses was a direct response to the pressing need for dedicated resources to aid and guide them amidst significant cultural and societal adjustments.