What is true about the materials flow in supply chain management? Group of answer choices Hybrid push-pull systems are the most rare in supply chains In PULL flows production and movement of materials only occur in response to a formal order from a centralized information technology system that manages the supply chain None of the other answers In PUSH flows production and movement of materials only occur in response to a formal order from a customer located further DOWN the supply chain In PULL flows production and movement of materials only occur in response to a formal order from a customer located further DOWN the supply chain