35As regards, in particular, a Commission decision which relies exclusively, with respect to certain addressees, on the presumption that they actually exercised decisive influence, the Commission is in any event required — if it is not to render that presumption in reality irrebuttable — to explain adequately to those addressees the reasons why the elements of fact and of law put forward did not suffice to rebut that presumption (Case C-521/09 P Elf Aquitaine v Commission [2011] ECR I-8947, paragraph 153).
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