Final answer:
Maintaining a healthy weight through regular physical activity and a healthy diet can help mitigate the risk of developing type 2 diabetes for nurses or anyone who has a higher BMI.
Step-by-step explanation:
In the 'nurses study,' the percentage of nurses who maintained a higher BMI and were at risk for developing type 2 diabetes is not provided in the information given. However, it is mentioned that about 80 to 90 percent of people with type 2 diabetes are overweight or obese, indicating that higher BMI is a risk factor for developing type 2 diabetes. Maintaining a healthy weight through regular physical activity and a healthy diet can help mitigate this risk.