What is one of the main characteristics of a firm pursuing the best-cost strategy? a. Taking the mediocre path by targeting the average household in terms of income b. Focusing on a narrow niche with best-in-class resources c. More features with added value than low-cost providers \& more attractive prices than differentiators d. Achieving lower cost than competitors for all activities in the value chain e. Competitive advantage through best-in-class operating activities