Final answer:
Value-added resellers purchase a variety of equipment from several manufacturers and package them as a system.
Step-by-step explanation:
D) Value-added resellers purchase a variety of equipment from several manufacturers and package them as a system. They add value to the products by providing additional services such as technical support, maintenance, and customization. Value-added resellers are intermediaries between manufacturers and end-users, helping to meet specific customer needs and providing a complete solution.