Which of the following are pitfalls of using a combination strategy? (Check all that apply.) Multiple select question. Firms that are not able to attain both strategies may become "stuck in the middle." Firms become known for being either a cost leader or differentiator and fail to attract enough of a customer base. Firms may miscalculate sources of revenue and profit pools in their industry. Firms may underestimate the challenges and costs associated with coordinating value-creating activities in the extended value chain