Final answer:
The priority information for the nurse to teach the client and the client's family is guidelines for exercise.
Step-by-step explanation:
The priority information for the nurse to teach the client and the client's family is 4. Guidelines for exercise. While all the options mentioned are important in managing diabetes, exercise plays a crucial role in controlling blood glucose levels and improving insulin sensitivity. Regular physical activity can help reduce the risk of complications associated with diabetes and improve overall health.