Which of the Following Is One of the Supervisory Authority's

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

A) To notify the controller or the processor of an alleged infringement of the GDPR.
B) To require that controllers or processors adopt approved data protection certification mechanisms.
C) To determine whether a controller or processor has the right to a judicial remedy concerning a compensation decision made against them.
D) To require data controllers to provide them with written notification of all new processing activities.