Which of the following are the data classification categories?

The correct choice is ownership, as it is a fundamental category in data classification. Data classification involves organizing data into categories that reflect its importance, sensitivity, and necessity for protection. Ownership refers to the identification of who is responsible for the data, which helps in determining how the data should be managed and governed.

By establishing ownership, organizations can ensure that appropriate measures are taken for data protection, compliance with legal requirements, and alignment with internal policies. Knowing who owns the data is vital for enforcing security protocols, establishing access controls, and facilitating data stewardship.

While other options like obligation for retention and preservation, data type, and parameter type may play roles in data management or regulatory compliance, they do not represent core categories of data classification in the way that ownership does. Data classification primarily focuses on sensitivity and access requirements, where identifying ownership is a critical first step in managing those attributes.