A marketing system is mainly defined as an environment where main players, such as suppliers, companies, competitors, marketing intermediaries, and consumers come together, so the correct answer is E.

Companies work with their suppliers in order to supply the needed parts, raw materials, services needed in their production processes. Suppliers can have a significant influence on a manufacturer’s performance, through their contributions to cost reduction, new product design and enabling the constant improvement of quality. In today’s increasingly competitive environment, it is no longer enough to understand customers in the marketing system of the companies. Firms must pay close attention to their competitors and need to constantly compare their products, prices, channels, and promotional efforts with their competitors. The main role of marketing intermediaries is to make goods available and accessible to target markets by offering more effectiveness and efficiency than the selling company could achieve on its own. This is realized through their contacts, experience, specialization, and scale of operation.All the parties in the marketing system are affected by major environmental forces such as economic, political/ legal, demographic, physical, technological, and social/cultural forces.