The cybersecurity framework most likely selected by the Chief Information Security Officer (CISO) of a large management firm to demonstrate the organization's investment in tools and systems to protect its data is: C. ISO 27001. ISO 27001 is an internationally recognized standard for information security management systems (ISMS). It provides a systematic approach to managing sensitive company information, ensuring its confidentiality, integrity, and availability. ISO 27001 certification demonstrates an organization's commitment to implementing and maintaining robust information security practices, including the selection and deployment of appropriate tools and systems to protect data.

ISO frameworks protects data

ISO framework makes the most sense, especially for a large organization.