In the United States, the first largest immigration movement took place _____.A. right after the War of IndependenceB. in the mid-1810sC. at the turn of the 20th centuryD. right after the Civil War-湖北继续教育网网校

[单选题]

In the United States, the first largest immigration movement took place _____.
A. right after the War of Independence
B. in the mid-1810s
C. at the turn of the 20th century
D. right after the Civil War