What is Twitter?
A) a business-oriented website that lets users post their profiles and connect to a network for business people
B) a website that enables users to send and receive messages up to 140 characters long
C) a social networking site that allows for people to keep in touch with photos, videos and short-text entries
D) an information site that allows users to connect through e-mail
E) a video-sharing website in which users can upload, distribute and view videos
Answer: B - a website that enables users