Answer:
D. 80; 80
Step-by-step explanation:
During the mid-1870s, a significant number of immigrants settled in the United States. It was recorded to be around 80%.
The influx of newcomers resulted in anti immigrant sentiment among certain factions of American indigene. The new arrivals were often seen as unwanted competition for jobs, while many Catholics especially the Irish experienced partiality for their religious beliefs.
Following the Civil War, the United States suffered downturn in the 1870s that contributed to a slowdown in immigration.
By 1910, 80% was also said to have migrated from southern and eastern Europe. 1910 was around a time of rapid industrialization and urbanization, America received millions of immigrants. Majority of them were from Central, Eastern and Southern Europe. Jews from Eastern Europe fleeing religious persecution also arrived in large numbers. The outbreak of World War I (1914-1918) caused a decline in immigration.