The elementary schools in district X began a new athletic program where students participated in school-sponsored sports at least three times per week. During this last school year, the number of obese students attending elementary schools in district X decreased substantially. Based on these figures, the district' s superintendent decided that the new athletic program was more effectual in keeping children, at least while in elementary school, from being obese. All of the following, if true, weaken the superintendent's conclusion EXCEPT: ['The government, during this last school year, began requiring monthly weigh-ins for obese children and parental counseling about proper nutrition.', "A large number of the obese children's conditions were caused by depression, which was greatly alleviated by installing psychiatrists in each elementary school in district X.", 'Obesity, like other unhealthy conditions, can lead to decreased cardiovascular health, increased joint pain, and self-esteem problems.', 'Over the last year, parents with obese children in district X began sending their children to special weekend camps designed to help children lose weight.']