Final answer:
The best action for a service representative is to apologize and offer a refund or exchange for the bat, ensuring good customer service and maintaining business reputation.
Step-by-step explanation:
The best course of action for a client service representative when dealing with a complaint about a product, such as a baseball bat being too heavy for a child, would be to apologize to the mother for any inconvenience caused and offer a refund or exchange for a lighter bat. This approach demonstrates good customer service by acknowledging the issue, taking responsibility, and providing a practical solution. Not only does it help rectify the situation at hand, but it also preserves the business's reputation and encourages customer loyalty.
Ignoring the mother's complaint or blaming the sales associate would not be proactive or professional responses. These actions could lead to customer dissatisfaction and potential loss of business. Asking the mother to try using the bat for a few more days does not immediately address her concern and might not result in a satisfactory outcome for the customer.