It would be ils se promène, I believe, but it could be promèner, check to see if your verb needs to be conjugated.
C) ont since it's plural more than one filles
14. C
<u>Qu'est-ce que</u> Marc mange? (Not a who, is a what, and no vowel following)
15.A
À <u>qui</u> est-ce que Paul parle? (Is a 'who' that he is speaking to.)
16.C
<u>À quelle heure</u> est-ce qu'il dîne? À six heures? (Second sentence indicates they are asking about time.)
17. A
<u>Comment</u> est-ce qu'elle chante? Bien ou mal? (Second sentence indicates speaker is asking about the quality, 'how' she is singing.)
18. C
<u>Pourquoi</u> est-ce que tu aimes ce restaurant? -Parce que les sandwiches sont excellents! (Response with "parce que" means that the first speaker was asking 'why'.)
