Answer:
Between-Subjects Design
Step-by-step explanation:
The advertisement was shown to two different groups of people because Between-Subjects Design was used. This type of design determines that a research will bring together two groups of people, where each person, of each group, will only be exposed to one treatment of the experiment, that is, to a tested element, having not counted on the other treatment of the experiment. This allows the research to be able to compare the results of each treatment in different people.