41In particular, such an undertaking may demonstrate, for that purpose, either that its conduct is objectively necessary (see, to that effect, Case 311/84 CBEM [1985] ECR 3261, paragraph 27), or that the exclusionary effect produced may be counterbalanced, outweighed even, by advantages in terms of efficiency that also benefit consumers (Case C-95/04 P British Airways v Commission [2007] ECR I-2331, paragraph 86, and TeliaSonera Sverige, paragraph 76).
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