The best option for Trevor to visit his doctor would be B. for a preventative care visit every five years. Preventive healthcare involves regular checkups, screenings, vaccinations, and other measures to promote health and wellness and prevent or diagnose illnesses early. Regular visits to a doctor for preventive care can help to catch any potential health problems before they become more serious and require more intensive treatment. Office visits should ideally be done on a regular basis, even if there are no current symptoms, to maintain good health and ensure that any underlying conditions are diagnosed and treated early.