I’m Spanish and I’m sure that the answer is A!
1. me cepillo
2. te lavas
3. se peinan
4. se pone
5. se quita
6. se afeita
7. nos maquillamos
8. estiran
9. me levanto
10. nos enfermamos
THE RIGHT ANSWER IS:
LOS ALUMNOS NO ESTUDIARON ANOCHE :)
HOPE THIS WAS HELPFUL FROM ALL THE OTHER ANSWERS IM SPANISH BTW