75The applicant cannot, therefore, maintain that the Commission was not in a position either to impute to it the unlawful conduct of BNGW for the period from 21 June 1996 to 1 October 2000 or to order it jointly and severally to pay the fine. According to settled case-law, the Commission has a margin of discretion in deciding which entities within an undertaking it considers liable for an infringement (Case T-65/89BPB Industries and British Gypsum v Commission [1993] ECR II-389, paragraph 154, and Michelin v Commission, cited in paragraph 26 above, paragraph 290). Nothing, therefore, precludes the applicant from being held solely liable for the conduct of BNGW.