Read the following summaries of the original text and decide which one retains the main idea with vocabulary and structure changed. "The number of everweight children is predicted to rise significantly around the world by the end of the decade. Research conducted in 25 countries has concluded that almost every country showed significant increases in childhood obesity. Almost 50% of children in the US, Canada and Latin America will be overweight by 2020; in China, this figure is estimated to be one infive. Scientists believe this will mean that health care service will be seriously affected in the future. Many obese children will become obese adults, which will result in many of them suffering from heart disease, stroke, and other weight-related ailments. A. Since the number of overweight children worldwide will increase around the world, health care services will be seriously affected in the future. B. The increasing number of obese children worldwide will cause serious problems to medical services. C. There will be a significant rise in the number of obese children around the world by the end of the decade.