Final answer:
All of the choices are correct. Cancer registrar duties include abstracting data for tracking, staging tumors, and following up with reportable cancer patients.
Step-by-step explanation:
All of the choices are correct. Cancer registrar duties include abstracting data for tracking, staging tumors, and following up with reportable cancer patients. Abstracting data involves collecting, organizing, and analyzing information about cancer patients to track trends and outcomes. Staging tumors involves classifying cancer based on factors such as tumor size and spread to determine prognosis and treatment options. Following up with reportable cancer patients involves ensuring that necessary data is collected and reported according to regulatory requirements.