The following statements are all correct about the commonalities of Uber and Airbnb EXCEPT ______.

A. They are smart about how they chose to expand, picking the right cities at the right time to maximize their success.
B. They both focused on giving priority to customers rather than services.
C. Tools are used to expand their customer base at differnet stages.
D. They provide services during the times when the demand is likely to be the highest.