Which of the Following Is True of a Vertical Marketing

Which of the following is true of a vertical marketing system?

A) It does not give overall power to any one member in the channel.
B) It is formed when two or more companies at one level join together to follow a new marketing opportunity.
C) It is formed when a single firm sets up two or more marketing channels to reach one or more customer segments.
D) It has one channel member owning all the other channel members or has contracts with all other channel members.
E) It has each channel member acting as a separate business unit trying to maximize its own profits.