Entrepreneurs are scrappy in their quest to gather market intelligence and understand how customers respond to their offerings. how did airbnb's ceo gather additional intelligence on how the firm was being used?

Thank you for posting your question here at . Below are the choices that should accompanied with the question above, the answer is letter C. 

a. He bought several apartments to rent out under Airbnb
b. He became an Uber driver
c. He lived out of Airbnb rentals full-time
d. He became a bell hop at a San Francisco Hilton Hotel
e. All of the above