I think that its A because in Colombian private and public schools you have to wear a uniform but only in Spanish private schools you have to wear one.
espero que esto ayude!
12: Acompañas
13: Bailan
14: Cantamos
15: Cobran
16: Compró
17: Descansamos
18: Enseñó
19: Gana
20: Llama
I’m pretty sure A is the correct answer
