Yellow fever is a painful, often-fatal disease in tropical areas of Africa and Central and South America. How does it spread? There seem to be common conditions when yellow fever breaks out. I describe each condition, and then offer a suggestion that may minimize the spread of disease. 1. Lack of immunity. Provide vaccines to prevent breakouts. A single does of yellow-fever vaccine will provide lifelong protection. 2. Still water. Mosquitoes carry the disease, and they breed in water that sits still. Eliminate or chemically treat places where water collects and sits still. 3. Insects bites. Close yourself indoors. cover your skin with thick clothing, and use repellent. Which statement best describes how the author organize the information? A. The author shows cases of yellow fever and prescribes medical treatments. B. The author analyzes the effects of yellow fever and traces its cause to insects. C. The author identifies the problems of yellow fever outbreaks and offers solutions D. The authors describes certain experiments and offers conclusions based of experience.