The best and most correct answer among the choices provided by your question is the third choice or letter C.
The lesson that the parable of "The Prodigal Son" mainly conveys is that: "<span>Everything that was once lost will one day be found again."</span>
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If you want to appeal to an audience, the best way is to make them have an attachment to what you are saying. By having them imagine their <em>own</em> families free, they will relate more to the speech and national leader.