Final answer:
In situation comedies, characters are typically under stress from everyday situations that lead to humorous outcomes, rather than undergoing dramatic changes.
Step-by-step explanation:
In a situation comedy, it's not typically the case that characters change dramatically over the course of the series, as this genre tends to focus more on humor derived from everyday situations and character interactions. Unlike melodrama, where characters might be bombarded with over-the-top emotional challenges, a situation comedy presents its characters with practical challenges, often revolving around day-to-day life, resulting in comedic outcomes. For instance, the characters might deal with questions like how to sneak food without getting caught or how to evade an awkward social encounter. Therefore, the correct answer to the student's question is that in a situation comedy, characters are under a great deal of stress (C), stemming from these entertaining and relatable predicaments, which calls for a good laugh rather than dramatic developments or profound character introspection.