This question has more than one correct answer, which all must be selected. Select all the statements that are true. Question 15 options: Inventory is a stock of material used to satisfy customer demand or support the production of goods and services. Backward integration describes the practice of gaining control over supplies by acquiring a controlling interest in one or more of a company's major suppliers. The order-fulfillment process involves the activities to deliver a product or service to the customer. Work-in-process inventory is considered an input to the transformation processes of the firm. Manufacturing firms typically enter into contracts with Tier 2 suppliers with the expectation that these suppliers will then incorporate the guidelines of these contracts into the agreements they in turn enter into with Tier 1 suppliers