| 摘要 |
<p>A quiz is added to an advertisement presented by a communication service side providing free service through a wire or wireless communication circuit, and the answer of the quiz is inserted into the advertisement. The person who wants to receive a free service sends the answer after viewing the advertisement. Only when the sent answer is the correct one, the free service is offered. Therefore it is ensured that the advertisement is viewed by the person, and advertisement/publicity is efficiently and reliably performed.</p> |
