Americans today are 32% less active than Americans in 1965 and are expected to reduce 46% by 2030; in China, people are losing 45% of their activity compared to 1991 and are expected to reduce 51% by 2030. Has become a global issue. Which of the following, if true, best supports this view? ["People's physical activity in other countries is about the same as China and the United States.", 'The way people stay healthy is becoming more diverse.', 'China and the U. S. are both countries with serious problems of lack of exercise.', 'In terms of exercise volume, China and the United States are the most representative countries in Asia and the Americas, respectively.']