A catalog sales company promises to deliver orders placed on the internet within 3 days. Follow-up calls to a few randomly selected customers reveal that many received their orders after 5 days. Which of the following statements could be inferred from this situation?
a) The company's delivery system is efficient.
b) The company is failing to meet its delivery promises.
c) Customers are not interested in prompt delivery.
d) The company does not have an online ordering system.