Online Behavioural Advertising Is BEST Described as Which of the Following

Online behavioural advertising is BEST described as which of the following?

A) Targeting consumers who are heavy users of Internet and social media.
B) Targeting ads to people who have behaved online in a way that indicates they are interested, or might be interested, in a product.
C) An advertising campaign that uses ads placed in traditional media such as TV and magazines merely as a means of driving consumers onto relevant websites where they can place an order or find out more product information.
D) Using data mining and online sources of information to segment the market and build rich consumer profiles.
E) none of the above