Answer:
C is the correct answer.
Explanation:
Hello, you want to ask two sisters so it cannot be A or D, as this is not plural.
B is not plural neither, just a formal way to say 'you'.
<u>C is the correct answer.</u>
'Vous' refers to the two sisters.
Comment vous appelez-vous?
Hope this helps.
Do not hesitate if you have any questions.
Salut !
Mon père m'a donné ce cadeau pour mon anniversaire, quand j'ai eu 18 ans.
