Which of the following companies is using cost drivers effectively to manage value chain activities cost efficiently? a. company a orders large amounts of supplies and keeps them stocked until customer demand rises to prevent falling behind schedule in meeting customer needs. b. company b uses just in time inventories and produces made to order products as and when customer demand rises. c. company c collects customer requests first and starts processing them only after reaching a certain number. d. company d routes all its supplies to a warehouse for storage and then transports them to individual factories for processing. e. company e substitutes lower-cost inputs with high-quality, high-cost inputs to gain customer attention and loyalty.