Final answer:
A nurse should not attend to a patient with a cesium implant for more than 30 minutes per day to minimize radiation exposure, following the principles of time, distance, and shielding in radiation safety.
Step-by-step explanation:
The question refers to safety guidelines for healthcare workers dealing with radioactive materials, specifically, a cesium implant in a clinical setting. According to time, distance, and shielding principles of radiation safety, it is recommended that a nurse should not attend to a patient with a cesium implant for more than 30 minutes per day (Option B). This time limit is set to minimize the radiation exposure to the nurse while ensuring that the patient still receives the required care. The 30-minute guideline aims to protect healthcare workers from the potential harmful effects of ionizing radiation that can be emitted by cesium implants used in certain medical treatments.