The only inference I can make based on what I know about obesity in the United States is that the rates of obesity are getting higher in children and adolescents each year. Therefore the option I would choose as being correct here is that, healthy eating habits should be encouraged and implemented early in life.
Teenagers are at a higher risk of developing obesity in adulthood, obesity affects teenage boys the same as girls and no difference would occur in obesity diagnoses within males, it would be the same for females.