The importance of a firm's human resources includes the element of imitability which refers to the valuable and rare characteristics of a firm's human resources. What should a firm do to ensure that this strategy is sustainable over time? A b. Provide ongoing manager training in feedback and communication. B) c. Ensure that other firms are not able to replicate these unique characteristics over time. C) d. Integrate training systems across the organization. D a. Provide technical excellence in jobs