Answer:
The correct answer is Mi madre se viste a las ocho.
Explanation:
We use the reflexive verbs to demonstrate an action that the subject commits on himself. These kinds of actions are dressing, combing, sitting, etc. They are actions that each person does for himself.
The way to conjugate the verb sit as reflexive verb for each person is as follows:
Yo me visto
Tú te vistes
Él se viste
Ella se viste
Usted se viste
Nosotros/as nos vestimos
Ellos/as se visten
Ustedes se visten
