Question 5 (1 point) Saved Back in the late 19th century, the Carnegie Steel company controlled not only the mills where the steel was manufactured, but also the mines where the iron ore was extracted, the coal mines that supplied the coal, the ships that transported the iron ore and the railroads that transported the coal to the factory. Through several ______ mergers the steel company gained control of the various resources it needed to product steel. O 1) acquired 2) combination 3) horizontal 4) functional 5) vertical