Final answer:
The best response to a customer query about a partial order delivery is to explain the situation and offer a solution by investigating the cause, apologizing, and addressing the issue through either resending missing items, providing a refund, or offering compensation.
Step-by-step explanation:
In response to the customer's query about only receiving two of the four items she ordered, the best course of action is C) Explain the situation and offer a solution. This approach is professional and shows that you are taking responsibility for the issue. First, you should thoroughly investigate the situation to understand what caused the discrepancy. Once you identify the issue, apologize for any inconvenience caused, then explain to the customer what happened and why they received only part of their order. You should then provide a solution to rectify the mistake. This may involve sending the missing items as soon as possible, offering a refund for the unfulfilled items, or providing some form of compensation, such as a discount on future purchases. By addressing the customer's concerns promptly and effectively, you not only resolve their immediate issue but also demonstrate your commitment to excellent customer service, which can help maintain a positive relationship with the customer.