48. The Immigration Acts passed by the United States Congress in 1921, 1924, and 1927 were most influenced by

Answer: C

Explanation:

The Immigration Acts were most influenced by nativist prejudices against southern and eastern Europeans.

The Immigration Acts of 1921, 1924, and 1927 were primarily driven by nativist sentiments that aimed to restrict immigration from southern and eastern European countries, reflecting a broader xenophobic attitude during that era.

A) labor shortages in the booming industrial economy

While the booming industrial economy did create labor demands, it was not the primary influence behind the Immigration Acts. In fact, the legislation sought to limit immigration despite potential labor shortages, emphasizing a preference for certain immigrant groups over others rather than addressing labor needs.

B) opposition to Mexican immigration

Although there was opposition to Mexican immigration during this time, it was not the central factor influencing the Immigration Acts of the 1920s. The laws predominantly targeted immigrants from Europe, particularly those from southern and eastern regions, rather than focusing on Mexican immigration.

C) nativist prejudices against southern and eastern Europeans

This option correctly identifies the primary influence behind the Immigration Acts. The legislation reflected widespread nativist attitudes that viewed immigrants from southern and eastern Europe as undesirable, leading Congress to impose strict quotas that favored immigrants from northern and western Europe instead.

D) land shortages following the closing of the frontier

The closing of the frontier did impact American society, but it was not a significant factor in shaping the Immigration Acts. The legislation was more concerned with controlling the demographic composition of immigrants rather than addressing land availability issues.

Conclusion

The Immigration Acts of 1921, 1924, and 1927 were fundamentally shaped by nativist prejudices against southern and eastern Europeans, as these sentiments drove the desire to restrict immigration from these regions. Other options, while relevant to the broader context of immigration, do not accurately capture the primary motivations behind these specific legislative acts.