34According to that case-law, the Commission is entitled, if necessary by adopting a decision, to compel an undertaking to provide all necessary information concerning such facts as may be known to it but may not compel an undertaking to provide it with answers which might involve an admission on its part of the existence of an infringement which it is incumbent upon the Commission to prove (Case 374/87 Orkem v Commission [1989] ECR 3283, paragraphs 34 and 35; Joined Cases C-204/00 P, C-205/00 P, C-211/00 P, C-213/00 P, C-217/00 P and C-219/00 P Aalborg Portland and Others v Commission [2004] ECR I-123, paragraphs 61 and 65; and Joined Cases C-65/02 P and C-73/02 P ThyssenKrupp v Commission [2005] ECR I-6773, paragraph 49).
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