Final answer:
To convince a group about the heliocentric model, one must use a well-presented argument that is simple and easy to understand, incorporating examples like time zone differences and Earth's effects on oceans and atmosphere.
Step-by-step explanation:
To convince a group of young and relatively unintelligent individuals that the Earth revolves around the Sun, the best strategy is option C: the argument presented to the audience should be well presented and easy to understand. This approach involves clearly explaining the concept using understandable terms and accessible examples. For instance, one could describe the diurnal motion of the sun, explaining how at the same hour, friends in different time zones see the Sun in different positions, which would not make sense if the Sun revolved around a flat Earth. Additionally, examples of how the spinning of the Earth affects the oceans and atmosphere, such as tides and the Coriolis effect, can be employed to support the understanding that Earth itself is rotating.