Answer:
4. To reach a broad audience for his scooters.
Explanation:
Build awareness is an marketing objective used by brands or business companies to promote their products and give awareness about it to the large number of people. As Alan has introduced his new line of scooters, in order to successfully promote them he has to reach a broad audience that is why he has selected the option of "Build awareness". Google Display Ads are the visual forms of advertisements that appears on those websites that are Ad - supported. Due to the huge traffic on these sites it is easier for the brands to access people and inform them about their products through their Ads.