The answer would be: <span>Changing Age Structure of the Population
In order to create a successful marketing campaign for their products, marketing teams need to pay attention to the difference in taste that a new age group has compared to the older one. Because one day, the new age group will grow up to be the demographic that held the most economic power.
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The answer to this question is Expert testimony
Expert testimony refers to the testimony that is given by qualified individuals who dedicated their life within a specific field.
Other examples of an expert testimony would be quoting a world renowned programmer on the topic of online hacking