Which of the activities below would be undertaken by a firm when dealing with a supplier that has the highest total cost of ownership per unit? I. Terminate immediately. Il. Investigate to determine if the root cause of supplier activity costs may be internal. Ill. Evaluate the supplier's contribution to the firm's development of new products as compared to other suppliers. IV. Continue to monitor the supplier's performance closely. O a. I only O b. Ill only O c. ll and IV O d. Ill and IV O e. Il, Ill and IV