Answer:
B. Its B Niger river.
Explanation:
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The answer in this question is Southern and central China. In the year nineteenth century in China and East Asia it was mainly in Southern and central China. On the graphic that is included in the question the British sphere of influence in the 19th century in East Asia and China was mainly in southern and central China.
Most noticeably would be the insane developments in organized crime, as so many people illegally went to and created speakeasies.
Its C i believe, Economic push factors of immigration include poverty, overpopulation, and lack of jobs. These conditions were widespread in Europe during the 1800's