Answer:
A). It presents the positive association that everyone who purchases the radio will have years of happiness.
Step-by-step explanation:
Advertisements employ a variety of techniques(like visual design, images and brief and effective slogans) to captivate the audience's attention and promote the product before them in order to improve the company's image and produce the demand for it.
The given advertisement employs the technique of 'positive association' to serve its purpose of convincing the audience about the reliability and efficacy of the product. It does so by positively affiliating the product i.e. 'radio' with the 'years of happiness' that not only gains the audience's attention and interest but also encourages them to purchase it. Therefore, option A is the correct answer.