A British study found that as long as people drink a 500 ml glass of water half an hour before each meal and persist for 3 months, they can lose 2 to 4 kg of weight. The research team invited 84 overweight adults and randomly divided them into 2 rents. Among them, 41 were required to drink 500 ml of water before meals, and 43 lived as usual. After 3 months, the team found that the average weight of people who drank water before meals had dropped by 4.3 kg: and those who did not drink water before meals People, the average weight only dropped by 0.81 kg, the researchers said. The group of people who did not drink water had an "average amount of exercise" higher than those who drank before meals, which means that drinking proper water before meals can really lose weight. Which of the following, if true, would best support the above conclusion? ['The group who drink water before meals also pays attention to diet control.', 'Some people who did not drink water before meals lost 4 kg.', 'Except for drinking water before meals, the other two groups are the same.', 'People who do not drink water before meals will drink more soup and drinks during meals.']