Final answer:
Buy-Mart could be held liable for the tort committed by Valerie Watts under the doctrine of respondeat superior, which holds employers accountable for their employees' actions within the scope of their employment.
Step-by-step explanation:
Buy-Mart could be held liable for the tort committed by its employee, Valerie Watts, under the doctrine of respondeat superior. This legal doctrine holds an employer responsible for the actions of an employee when those actions are carried out within the scope of employment. Even though Watts may have violated the store's no-fighting policy, if her interaction with Lynne Meyer occurred during her normal work duties, the company could be liable for her actions.