Based on the examined graph, the group that is most likely to have been influenced by the ad campaign is group c.
What is the objective of an ad campaign?
A campaign is known to be one that can be designed to bring about an awareness of one's company, product, or service that is said to be within a clearly stated target market.
Note that an ad campaign is seen also as a composition of advertisements that is seen within or around a single message and is one that is often made to get a specific goal.
Note that from the image shown group c was down but as a result of the ad, they went up.
Therefore, Based on the examined graph, the group that is most likely to have been influenced by the ad campaign is group c.
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