Question

http://prntscr.com/hkg169 Who's good at history?

Answer 1

@Ultrilliam

Answer 2

@JustSaiyan @Arcadiouse

Answer 3

Andrew Carnegie had the monopoly in steel, thomas edision was light bulb, alexander graham bell was inventor of the telephone. Telegraph made communication easier and was important in the 19th century. And the monopoly or trust eliminated competition.