One of the Earliest,largest and Most Famous Examples of Vertical

One of the earliest,largest and most famous examples of vertical integration was the Carnegie Steel Company.The 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.Carnegie Steel has a(n) _____ channel relationship.

A) Arm's-Length
B) functional
C) cooperative
D) hierarchical
E) integrated