Answer:
Nosotros volvemos a la escuela.
Explanation:
With the form of nosotros, the word doesn't change.
Estamos: we are
estas: you are
estan: they are
The question says where are Maria and Adela? You should change “Maria and Adela” to they, do the third option is correct.
Answer:
Oh, sorry, dude. I wish I saw it sooner.
Explanation: