Which of the Following Is True of a Vertical Marketing

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

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