Relevant statistical results show that in terms of the incidence of coronary heart disease, developed countries are nearly three times the number of developing countries. Some people think that this is due to the high fat, high protein, and high calorie food intake of people in developed countries. Few people in developing countries have the conditions to have this kind of "rich and precious disease". In fact, this view is difficult to establish. It ignores the fact that the average life expectancy in developed countries is higher than 70 years, while developing countries have Under 50. Which of the following best strengthens the rebuttal? ['tatistics show that coronary heart disease is relatively concentrated in the middle-aged and elderly stages, that is, over 50 years old.', 'enerally speaking, the longer a person lives, the higher the probability of having a certain disease in his lifetime.', 'Relative to developing countries, people in developed countries have higher common sense and better medical conditions for preventing and treating coronary heart disease.', 'The intake of high-fat, high-protein, and high-calorie foods by people in developing countries, both in total and per capita, is increasing year by year.']