Which of the following best describes the responsibilities of a Data Controller?

The responsibilities of a Data Controller primarily revolve around determining how and why personal data is processed. This includes establishing the intent behind the data collection and the methodology for handling that data. A Data Controller must ensure that processing activities comply with applicable laws and regulations, including ensuring that individuals' rights are protected and that their data is managed responsibly and ethically.

Establishing the purpose is a critical first step in any data processing activity, as it sets the framework within which the data will be used. This responsibility also encompasses identifying which data needs to be collected and processed in relation to the defined purpose, ensuring transparency, and being accountable for the data's lifecycle.

In contrast, collecting personal information without restrictions would violate privacy principles and regulations, as it does not consider individuals' rights. Processing data shared by third parties does not reflect the primary role of a Data Controller, which includes direct responsibility for data collection and purposes rather than merely handling data from external sources. Lastly, a Data Controller is expected to be proactive in decision-making regarding data processing, rather than avoiding such decisions, as this would neglect the necessary oversight and governance of data practices.