Answer:
Open system
Step-by-step explanation:
An open system is one that interacts with their external environment. Businesses are constantly changing to give better service and provide better products. The use of an open system encourages feedback from the external environment (customers and other stakeholders) so the business knows how customers react to their service and how to improve to meet customer needs.
Acme sales practices open system by calling their customers and carrying out surveys to get customer feedback.