Answer:
price stability
Step-by-step explanation:
In this scenario, the day-to-day challenge of firm growth that this example is referring to is price stability. Since the prices of the competing store are being changed (on purpose) Betty Harrington's firm will have a hard time adjusting in order to continue competing with the larger competing store, especially if the larger store lowers the price too much that Betty's store cannot actually lower theirs to that price. Thus ultimately forcing her out of the market.