Reed is helping a customer who claims her order was not delivered. After spending an hour calling various individuals, he finally locates the package. What is the most effective approach for Reed to use in this situation?

A. Offer the customer a refund for the inconvenience
B. Apologize to the customer and explain the delay
C. Investigate the reason for the delivery issue and take appropriate action
D. Ignore the customer's complaint and move on to the next task