(Grant & Jordan) Michael Porter's framework of generic strategies states that firms get stuck in the middle because: a. The mindsets of cost-minimization and differentiation are culturally opposed, and firms cannot optimize the investments needed for both at once. O b. As a above and firms need very different organizational processes to achieve the lowest costs or effective differentiation in the industry. O c. Mid-market positions are unattractive to consumers. d. Many firms have had several different CEOs, each determined to pursue different strategies.