I had a question like this for my class a long long time ago when I was in elementary school kind of and if I’m correct the answer was B for my class but it could be different for you
you have to do it yourself because I haven read the story.
All of them mean you
Tú - you second person
Usted is a singular form
<span>Ustedes is a pural
you answer would be ustedes!!
</span>
Do you mean to address your teacher?
If so then you would say "Maestra..." then tell her what you need to tell her
