.Using your knowledge of world history, the sources above MOST directly reflect which of the following historic trends?
A. In the 19th Century, new technologies affected
demographics.
B. In the 19th Century, varying environmental conditions
led to different outcomes for migrants.
C. In the 19th Century, migrant settlements suffered
disadvantages due to mistreatment by employers
and political leaders.
D. In the 19th Century, states attempted to regulate the
flow of people across their borders