Answer:
Yo me maquillo a las siete de la mañana.
Hence your answer is b
Step-by-step explanation:
Translation : I put makeup on at seven in the morning.
If you use "nos" it would be Nosotros nos maquillamos a las de la mañana. Therefore Yo which is I should not be part of this sentence instead " Nosotros" is used which means "we". For "se" it would be Ella se maquilla a las siete de la mañana.Finally for "te" it would be Yo te maquillare a las siete de la mañana.
This is why the other answers are incorrect and how they are supposed to be used in the sentence in case the teacher use the same format. I hope this helps, don't forget to rate.