Presenting answers to a plurality of recipients comprises presenting media content to the recipients, presenting a question based on the content to the recipients, and presenting answers to the recipients. The answers presented to one recipient are different from the answers presented to another recipient. The answers can be different for each recipient based on a random order assigned to the choices for each recipient. The answers can be different for each recipient based on different choices presented to each recipient. The correct answer presented to a recipient can change over time depending on the choices presented to the recipients. Each recipient can submit a response to the question by selecting one of the answers, where a correct response suggests or verifies that the correctly-responding recipient was exposed to the content. Correctly-responding recipients can qualify for a prize. The media content can comprise one or more advertisements or entertainment content.