What are value drivers? Select one: O A. a set of guidelines for identifying the most promising upscale attributes to incorporate into a product OB. a firm's hidden success factor for creating over-the-top product features that will command the highest price in the industry OC. a set of factors that verify the unique nature of a firm O D. a technique for easily identifying factors that validate a firm's performance E. a set of factors (analogous to cost drivers) that are particularly effective in having a strong differentiation effect