Carl Is the Owner of a Steel Plant

Carl is the owner of a steel plant. His company works on the principle of vertical integration. This implies that:

A) he shares his profit with other companies.
B) he buys raw materials from other companies.
C) he controls everything from raw materials to finished products.
D) his organization is weighed down by a high level of bureaucracy.
E) his organization has taken over its competitors to lower costs and competition.