I think it would be option C. John Roebling
Hoped this helped. :)
Mongol leader Genghis Khan (1162-1227) rose from humble beginnings to establish the largest land empire in history. After uniting the nomadic tribes of the Mongolian plateau, he conquered huge chunks of central Asia and China. His descendants expanded the empire even further, advancing to such far-off places as Poland, Vietnam, Syria and Korea. At their peak, the Mongols controlled between 11 and 12 million contiguous square miles, an area about the size of Africa.
While in jail, he joined the Black Muslims, a new branch of Islam. Burning to know more about his faith, he began a campaign to improve his reading and writing. After copying an entire dictionary page-by-page he read every book in the prison library had in philosophy, history, literature, and science.
