<h3>Reason :</h3><h3>Cuz it's refered to more than one, it's a plural version of person.</h3><h3>But,</h3><h3>People's is a singular form cuz </h3><h3>it's refered to a nation's citizens or tribe.</h3><h3>Hope it helps....</h3><h3>Stay safe, stay healthy and blessed</h3><h3>Have a good day</h3><h3>Thank you</h3><h3 />
People—the unit—is a singular count noun, as you can see from "a great people," and a plural count noun. The word 'people' has a final -s only when it is used to refer to ethnic or national groups.
I have seen both of these used in short stories heck both have been in the same kind of story, as for B and D they both sound like stories that will be more than just a short story.