An electronic goods manufacturer launched a promotional campaign which involved a flat twenty percent discount on all purchases made on the manufacturer's website. This campaign became very popular. However, the large number of simultaneous purchases on the website caused it to crash. Which of the following statements can definitely be concluded from this information?
A. The company's website was not secure, which made hacking easy.
B. The online sales resulting from this promotional campaign generated more revenue than its retail outlets during the same period.
C. Promotional campaigns involving a discount generally result in a loss rather than an increase in profit.
D. The company's website did not have the capacity to handle such a high load.
E. Sales at the manufacturer's retail stores were at an all-time low prior to the promotional campaign.