Which of the following is not among the best routes to achieving a sustainable competitive advantage via differentiation? a. Incorporating features that raise product performance and deliver added value to the buyer/end-user b. Delivering value to customers on the basis of competitively valuable resources and capabilities that rivals don't have or can't afford to match
c. Incorporating product attributes and user features that lower the buyer's overall costs of using the company's product
d. Focusing on continuous product innovation e. Appealing to buyers who are sophisticated and shop hard for what they consider to be the best, stand-out differentiating attributes