The correct answer is B. More immigrants from eastern Europe.
Explanation:
1. The U.S. immigration laws based on national origin were influenced by the increase in the number of immigrants from eastern Europe during the late 19th and early 20th centuries.
2. This influx of immigrants from eastern Europe led to a shift in the demographic composition of immigrants entering the United States, prompting policymakers to consider national origin as a factor in immigration laws.
3. The Immigration Act of 1924, also known as the National Origins Act, restricted the number of immigrants allowed entry into the U.S. based on their country of origin, favoring those from northern and western Europe over eastern and southern European countries.
4. Therefore, the increase in immigrants from eastern Europe played a significant role in shaping U.S. immigration laws based on national origin.
