A national 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 to be randomly divided into 2 rents. Among them, 41 were required to drink 500 ml of water before meals, and another 43 lived as usual. After 3 months, the team found that people who drank water before meals had an average weight loss of 4.3 kg: while 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 a "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.']