Hearthland Bakery, a company specialized in high-quality baked goods, has recently decided to add a gluten-free product line due to feedback from people who had previously consumed Hearthland's products. Hearthland wants these people to still be able to enjoy its products rather than going to a competitor that can satisfy their needs. This is an example of a(n) _____ force for change. a. Customer b. Social and political c. Management d. Shareholder e. Technological f. Performance