Answer: Who has a cell phone. fifteen students have cell phones???
Explanation:
Answer choice A.
The verb is chosen based on the pronoun effecting the verb.
In this case the pronoun would be ‘elle’ meaning ‘she’. Which, he/she/one is always met ‘est’ when it comes to the verb ‘etre’(to be).
I believe it’s the first one
Elle s'est entendue
Je me calme
Elle s'est levée
Vous étes rentrés (circumflex accent on first "e")
Ils étudiaient
Nous avons lu
Tu as vécu