The answer is letter c. He emigrated from Scotland to America in 1848. He started at the age of 18. He later worked in the railroads where he quickly rose from the ranks. From there he made a fortune in the steel industry. Apart from amassing a fortune in steel, He was also a philanthropist who late in his life in various social projects. He built libraries in the United States, Great Britain and Canada other countries. He also established school such as the Carnegie Institute of Technology in Pittsburgh, The Carnegie Institute in Washington.