A recent foreign research study found that there is an internal relationship between obesity and poor socioeconomic status, and those who have a lower socioeconomic status are mostly obese, even the poorer and the fatter. The researchers explain that this is because of society People with lower financial status are more likely to choose high-calorie, low-nutrition fast foods, and the ingestion of these foods can easily lead to obesity. Which of the following, if true, would weaken the researcher's explanation above? ['Although the intake of high-calorie and low-nutritional foods is the dietary habit of some people, it is easy to cause malnutrition.', 'People who are just getting rich are more likely to indulge in high-calorie foods, and some poor people can only taste fresh foods occasionally.', 'The poor do not have enough money and time to exercise, but the rich are more capable of investing in physical health.', 'Now high-calorie and low-nutrition fast foods are becoming cheaper, and healthy low-calorie foods are becoming more and more expensive.']