The correct option is D Diabetes
Diabetes is a chronic disease and the patient suffering from diabetes have to manage the disease as there is no tangible cure. A patient might suffer from it for several years or even a lifetime. According to WHO, malaria is an acute disease since the most severe symptoms last 7 days and with proper medical care, it can be cured. Symptoms of fever and influenza (or common cold) persist for a few days and so are acute diseases.