Under a marketing system, independent production and distribution firms integrate their efforts on a contractual basis to obtain greater functional economies and marketing impact than they could achieve alone.

contractual vertical

Explanation:

A vertical marketing system can be defined as a form of cooperation that exists between the different levels that makes up a distribution channel. The individuals in the channel ensure that they work in unity inorder to accelerate the rate of efficiency.

The three elements that constitutes a a vertical marketing system include:

- Producer

- Wholesaler

- Retailer

In a corporate vertical marketing system a single organization is responsible for production, development, marketing, and distribution of a particular product. All levels of the distribution channel is handled by a single company.

2b2t

explanation:

2b2t

answer; ///(d); determining who competes most closely   with whom evaluating whether industry driving forces and competitive pressure favor some strategic groups and hurt others, and ascertaining whether the profit potential of different strategic groups varies due to the strengths and weaknesses in each groups respective market positions;