Answer:
The correct answer is: KIDS.
Step-by-step explanation:
The target audience for an ad with a cartoon toothbrush would be KIDS, probably from 2 to 7 years. The toothbrush should be attractive in design, with many light colours, and it probably should have the image of a superhero. In order to attract children's attention, the ad should sell the idea that brushing teeth is very funny.