Based On what does the contract manufacturing (CM) Deliver Good to a customer ?

According to the Oracle Supply Chain Management Cloud: Plan to Produce training course3, contract manufacturing deliver good to a customer is the process of delivering the finished goods produced by a contract manufacturer to the end customer based on a sales order (D). A sales order is a document that captures and validates the customer’s request for goods or services. A transfer order (A) is a document that initiates an internal material transfer between two inventory organizations. A purchase order (B) is a document that initiates a procurement transaction with an external supplier. A shipment request © is a document that initiates a shipment transaction from one location to another.