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Quelle expression est exacte : A - Un équilibre économique A est pareto-optimal s'il n'y a pas d'autres équilibre B assurant l'égalité entre tous les coûts d'opportunité.B - Un équilibre économique A est pareto-optimal s'il n'y a pas d'autres équilibre B assurant l'équilibre entre l'offre et la demande.C - Un équilibre économique A est pareto-optimal s'il n'y a pas d'autres équilibre B offrant une meilleure situation à tous les individus.D - Un équilibre économique est pareto-optimal s'il n'y a pas d'autres équilibre B offrant une meilleure situation à au moins un individu sans léser les autres.

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