Choisissez l’option justeComment faut-il saluer ton ami quand te donne un cadeau?

Explanation

The question asks how one should respond when a friend gives them a gift. The correct answer is Merci beaucoup (thank you very much), a it is a polite and appropriate expression of gratitude. The other options - Bon appétit (good appetite), Bonne chance (good luck), Bonne journée (good day), and Félicitations (congratulations) - do not fit the context of receiving a gift.