Because of a high birthrate and considered immigration, the United States population in the late nineteenth century increased tremendously from 31 million in 1860 to 76 million in 1900.
Because of a high birthrate and considered immigration, the United States population in the late nineteenth century increased tremendously from 31 million in 1860 to 76 million in 1900.
A. birthrate
B. considered
C. increased
D. in