Most English noun plurals end in -s.
A.
This Is because It is introducing the white family, Mr. White, and Mr. Whites friend.
Answer:
I think it would be all of the above, if you could provide a passage with the question it would be helpful. But I'm not 100% sure if it would be all of the above.
Because it really does a lot to your essay. It makes it sound a lot better and more advanced. It makes your essays sound more adult and not like children books. It makes it more mature.