A data processor is responsible for which of the following tasks?

The role of a data processor is specifically defined under data protection laws, such as the General Data Protection Regulation (GDPR). A data processor is an entity that processes personal data on behalf of another entity, known as the data controller. The data controller is the one who determines the purposes and means of processing personal data, while the processor carries out the processing in accordance with the controller's instructions.

This means that the processor is not responsible for deciding how the data is processed or managing access rights directly. Rather, their main task is to execute the processing of data as directed by the data controller, ensuring that they adhere to the controller’s guidelines and the legal requirements surrounding data processing.

The responsibilities of managing personal data access rights and overseeing data protection policies generally fall under the purview of the data controller. In summary, option C accurately captures the essential function of a data processor within the framework of data protection legislation.