Which of the following is one of the supervisory authority’s investigative powers?

 According to Article 58 of the GDPR, each supervisory authority has the power to notify the controller or the processor of an alleged infringement of the GDPR as part of its investigative powers. This power allows the supervisory authority to alert the controller or the processor of a possible violation of the GDPR and to initiate further actions if necessary. The notification may also include recommendations or instructions on how to remedy the infringement or prevent further violations. References:

Article 58 of the GDPR

European Data Protection Law & Practice textbook, Chapter 9: Supervision and Enforcement, Section 9.2: Supervisory Authorities, Subsection 9.2.2: Powers of Supervisory Authorities