Final answer:
The nurse should follow the school's infection control policies, which often include education on hand hygiene and standard precautions to manage MRSA without causing undue panic or stigma.
Step-by-step explanation:
If a school nurse is reviewing the records of four students who are returning to school after being diagnosed with MRSA, the most appropriate action for the nurse to take would be d. Follow the school's infection control policies. This may include educating students on proper hand hygiene, ensuring that cleaning protocols are followed, and monitoring health conditions without causing unnecessary panic or stigma. Isolation in a separate classroom is typically unnecessary, as MRSA can be managed with standard precautions. Notifying all parents may cause undue alarm and is generally not recommended unless there's an outbreak or specific health advisory from public health officials. Education about hand hygiene is a part of standard infection control and is vital to preventing the spread of infections, but it should occur as part of an overall strategy in accordance with established policies.