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:
For question 4 it’s les because it’s plural considering ellas is a group of girls. question 5 is nos because the pronoun is nosotros meaning “we” hope this helps.