In 2007, Joe Gebbia and Brian Chesky realized they could not afford the rent on their pricey San Francisco apartment, so they decided to put an air mattress in their living room and offer people an alternative to an expensive hotel room. This is the story of how Airbnb got started. In other words, Airbnb began when Gebbia and Chesky ; the company grew because it .
a. identified their passions; was technologically based broke the law; successfully lobbied to get the laws changed.
b. studied consumer complaints; was based on idealism.
c. sought to put their competitors out of business; was based on their desire to change the world.
d. identified a problem or frustration; identified an opportunity or need.

Identified a problem or frustration; identified an opportunity or need. Airbnb began when Gebbia and Chesky identified a drag or frustration; the corporate grew because it identified a chance or need. that they had a drag of not having enough money to pay the rent, and that they identified a chance or need in letting strangers live there which they will afford, unlike an upscale bedroom.