What cause and effect relationship is described in this article? A. If teens with the gene variant engage in less than an hour of exercise daily, then they will have higher BMI scores and more body fat. B. If teens' test results were the same as the adults' test results, then the UM researchers would alter their recommendations. C. If teens engage in vigorous physical activity such as running or jumping rope, then they can avoid having to playing sports. D. If teens with the gene variant engage in one hour of daily vigorous physical activity, then they will have lower BMI scores and body fat as teens with regular genes.