Question: A 65-year-old man presents for a follow-up visit. His previsit questionnaire reveals that his diet, activity level, and sleep quality are areas of concern. His medical history includes depression, treated with maximal doses of bupropion and sertraline. He has a 30-pack-year history of smoking cigarettes. He says he would like to "get his depression under control" but does not want to add another medication and asks you what the fastest way is for him to start feeling better. What is the most appropriate response? Need Assignment Help? A. Increasing his exercise will be the fastest way to improve his mood. B. Quitting smoking will be the fastest way to improve his mood. C. Improving his sleep will be the fastest way to improve his mood. D. Improving his diet will be the fastest way to improve his mood.