The nurse teaches a class for the community discussing routine screening tests for different types ...

B
Rationale:
The nurse is providing secondary health prevention because the individuals are being taught to screen for existing disease. Primary prevention activities would be taken to prevent the occurrence of cancer; screening tests are not primary health prevention. Tertiary prevention would focus on halting the progress of the cancer. These individuals in the scenario are not receiving cancer treatment, so it is not a tertiary activity. Maintenance is a stage in the transtheoretical model of change, and is not a level of health prevention.