Questions 168~171 refer to the following email. 
Dear Valued Customer,
We regret to inform you that due to an unexpected surge in demand, we are unable tofulfill your order of two packages of laundry detergent on time. We apologize for anyinconvenience this may have caused you.
We have been working tirelessly to increase our production capacity to meet theunprecedented demand. However, we regret to inform you that we will need to delaythe shipment of your order by two weeks. We understand that this delay isfrustrating, and we apologize for any inconvenience this may have caused you.
To make up for the inconvenience caused by the delay, we would like to offer you acomplimentary package of laundry detergent with your shipment. Additionally, wewill refund the shipping charges to your credit card account.
We appreciate your patience and understanding in this matter. We value yourbusiness and strive to provide the best service possible. If you have any questions orconcerns, please do not hesitate to contact us.Thank you for your continued support.
Sincerely,Caroline Taylor Customer Service Representative
【題組】168. What is the reason for the delay in shipping the customer's order?
(A)The customer provided incorrect shipping information.
(B)The company experienced technical difficulties.
(C) There was an unexpected surge in demand.
(D)The product was out of stock.