The correct answer is en The correct sentence would be: "Il attend tous les jours en boulangerie." Which translates to "He waits every day at the bakery." "En" is a preposition that indicates a location or a place, in this case, he waits inside the bakery. Alternatively, the sentence could be "Il attend tous les jours à la boulangerie" (He waits every day at the bakery), using the preposition "à to indicate a specific location.