C. À.
The reason being that for cities, any city, we use à, we never use en, au or du or anything else.
Vouloir may be the ultimate example of those French verbs expressing someone's will, an order, a need, a piece of advice or a desire; they all also take a subjunctive verb in the que subordinate clause. Je veux qu'il le fasse. I want him to do it.
Answer:
Bonjour,
soient
Explanation:
Il est possible que quelques remèdes traditionnels soient efficaces.
No. They come from a deep frier.